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Georg Fischer Signet offers on-line information and assistance Please visit our website at www.gfsignet.com for: Product information – the “Products” link guides you to the latest product details including data sheets and manuals to assist in product selection, product installa- tion, calibration and operations. Manuals are provided in multiple languages. The Signet Application Library – a collection of typic- al industry applications and processes with detailed schematics, common measurement requirements and Signet products to meet those needs. Technical articles – A library of case studies, technical product write-ups and application solutions, sorted by technology and application 1

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  • Georg Fischer Signet offers on-lineinformation and assistance

    Please visit our website at www.gfsignet.com for:Product information the Products link guides you tothe latest product details including data sheets andmanuals to assist in product selection, product installa-tion, calibration and operations. Manuals are provided inmultiple languages.The Signet Application Library a collection of typic-al industry applications and processes with detailedschematics, common measurement requirements andSignet products to meet those needs.Technical articles A library of case studies, technicalproduct write-ups and application solutions, sorted bytechnology and application

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  • Choosing ProductsSystem Selection GuideThis section provides tips and suggestions on how tochoose just the right measurement system for your spe-cific liquid application needs. For specific product in-formation, refer to the individual catalog sheets.

    Step 1: Determine Application RequirementsDefining the following variables before building your sys-tem will ensure peak performance from your Signetsensors and instruments.

    Measurement rangeInstallation requirementsPipe size and materialChemical compatibility of all wetted parts to processchemicals

    Systems specifications (such as temperature andpressure)

    Performance requirements of sensorFluid particulatesViscosity of FluidsHazardous location requirements

    Step 2: Select Sensor TechnologyBased on the application requirements determined inStep 1, choose a sensor. For pH/ORP andConductivity/Resistivity electrodes, select your pre-ferred connection style. Keep in mind various connec-tion types such as cable or DryLoc systems. In addi-tion, users may be required to choose a preamplifier orsensor electronics.Then, determine your signal output requirement to al-low you to match just the right instrument (see Step 3).If youre not purchasing an instrument, select the sensorelectronics package that best suits your needs.

    Step 3: Choose instrumentChoose an instrument. All units are available in 1/4 DINpanel or field configuration and are available with eitherdigital, analog, or analog/digital display. Various retrofitadapters and mounting accessories are also available(see Accessories section). In cases where the sensorfeeds directly to a PLC or PC system, Signet offers awide range of instruments and sensors with 4 to 20 mAoutputs.Note: Please contact your local Georg Fischer salesand support office if you need assistance in choosingany one of these products.

    Step 4: Determine Installation RequirementsSignet offers a wide selection of installation fittings forin-line pH/ORP electrodes. These fittings are specific-ally designed to ensure the proper placement of theelectrode in the system to achieve optimum perform-ance. Other pH electrodes as well as all temperature,pressure and conductivity/resistivity electrodes usestandard fittings. All submersion electrodes require con-duit piping and fixtures not supplied by Signet.

    Features and Benefits

    TurbidityTurbidimeter

    Simple to install with mounting holes pre-drilled on acommon pattern.

    Easy and fast to calibrate.Programmable analogue output signal.Two adjustable alarm relays.Easy access for wiring and maintenance.Ultrasonic cleaning options ensures long and steadyon-line measurement.

    Simple desiccant pouch keeps the measuring cham-ber dry.

    Easy access for replacing desiccant.Standard EPA 180.1 for USA and Asia. ISO 7027 forEurope.

    Quick and easy installation, calibration and mainten-ance.

    4150 Turbidimeter

    Multi-Parameter Instruments9900 SmartPro Transmitter

    Multi-Parameter input selectionLarge auto-sensing backlit display with at a glancevisibility Dial-type digital bar graph

    Intuitive and user-friendly interface consistent withlegacy Signet ProPoint and ProcessPro devices

    Optional field upgradable relaysSelectable error mode for current outputs, 3.6 mA or22 mA

    4 to 20 mA input (with optional 8058 Signal Convert-er)

    Warning LED indicatorCustom 13-character label capabilities for the chan-nel type Factory reset capability

    Optional PC COMM configuration toolOptional H COMM module for two-way communica-tion

    2

  • 9900 SmartPro Transmitter

    ChlorineChlorine Analyser System

    Reagent free measuringComplete panel system allows for quick and easy in-stallation.

    Built-in flow regulator maintains constant flow andpressure to the sensors.

    Panel includes a 100-240 VAC power supply, two 4 to20 mA outputs and two mechanical relays.

    Optional automatic pH and temperature compensa-tion.

    4630 Chlorine Analyser System

    Dissolved Oxygen

    Process Optical Dissolved Oxygen SensorOptical DO measurement no flow requirementsRugged constructionCalibration built into the measurement cap 2% ofrange 0 to 20 mg/l

    One year measurement cap lifeNo membranes or filling solutionsFlexibel communications, 4 to 20 mA or Modbus(RS485)

    Measurement Range: 0 to 20 mg/l

    2610 Process Optical Dis-solved Oxygen Sensor

    Flow SensorsInsertion Paddlewheel Sensors

    Four-bladed paddle design ensures optimal perform-ance and lower flow rates than five or six-bladed ro-tors that have a higher weight/bearing inertia.

    The open-cell design and the controlled insertiondepth work together to deliver a linear and repeatableoutput over a wide dynamic range, with virtually nopressure drop in the process pipe.

    Choice of corrosive resistant plastics and ruggedmetals enable use in many aggressive fluids.

    The widest choice of installation fitting materials, sizesand connections on the market that meet endless ap-plication needs.

    Insertion design lowers installation and maintenancecosts.

    Self-powered sensors are well suited for remote loca-tions and are FM approved which enable installationin hazardous locations.

    Paddlewheel design has no pressure drop, making itideal for gravity flows.

    NIST traceable test certification with all plasticsensors provides superior price-to-performance ratio.

    Hot-Tap designs are available to allow service andmaintenance without shutting-down the process;saves costly downtime.

    3

  • 2536PaddlewheelFlow Sensor

    525MetalexFlow Sensor

    Flow-Through Rotor SensorsOperating flow ranges from 110 mL/min to 12110mL/min (0.03 US gpm to 3.2 US gpm) in cleanopaque or clear liquids ideal for precise low flow ap-plications such as dosing.

    Hall-effect devices provide excellent noise immunityoutput signals.

    Sensor body design allows easy access for cleaning,inspection and rotor replacement without the need forpowering down.

    Flexibility with end connections allow flexible tubing orrigid pipe installations.

    Four fully encapsulated magnets provide high resolu-tion signal output.

    2507Mini Flow Sensor

    In-line Turbine SensorsSmall compact design for tightly-spaced installations.Superior ceramic bearing provides long life withoutthe need for maintenance.

    Radio Frequency (RF) pick-up provides added ad-vantage without rotor drag or contamination from fer-rous particles.

    Detachable electronics means sensor maintenance ispossible without the need to cut power to unit.

    Composed of highly chemical resistant materials.Mounting at any angle offers total installation flexibil-ity.

    Wide choice of end connections in hose barb, flare orunion ends.

    Three flow ranges available for optimum measure-ment resolution.

    2100Turbine Flow Sensor

    Insertion Magnetic SensorsNo moving parts means no fouling or reduced wear.Insertion design provides easier installation and re-moval than full line magmeters.

    Model 2551 available to fit all pipe sizes ranging fromDN15 to DN900 (0.5 to 36 in.).

    Model 2552 Metal Magmeter available for pipe sizesup to DN2550 (102 in.). Hot-Tap versions also avail-able.

    Fluid diagnostics via LED indicators.Bi-directional flow and empty pipe detection.Rugged design with good chemi-cal resistance suit-able for tough applications.

    Analog 4 to 20 mA and frequency outputs provide sig-nals to remote flowmeters and data acquisition. Alsoavailable with digital (S3L) output for compatibility withmulti-parameter transmitters and controllers.

    High input impedance provides low sensitivity to coat-ing which makes it ideal for dirty liquids.

    Isolated outputs provide barrier to ground loops.

    2551Display Magmeter

    2552Metal Magmeter

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  • Analytical Sensors and ElectrodesStandard pH and ORP Electrodes:

    The amplified output ensures the process signal isresistant to electrical noise and allows up to 120 m(400 ft) before connection to the instrument.

    Longer reference path and larger reference volumemeans extended service life.

    Flat glass surface sensor design. Resistant to foulingand abrasion in dirty applications, and prevents acci-dental damage to extend electrode life span.

    Unique DryLoc design enables pH and ORP connec-tions instantly.

    Designed to mount in standard Signet fittings or con-nect to 3/4 in. standard fittings.

    Option for blind 4 to 20 mA output or digital (S3L)out-put for long cable runs.

    Preamplifier does not need replacing with electrodewhich significantly reduces service costs.

    2724-2726pH/ORP Electrodes

    2774-2777pH/ORP Elec-trode

    2750pH/ORP SensorElectronics

    Differential pH/ORP Electrodes:pH and reference signals are measured against thirdelectrode, a solution ground, to ensure a stable read-ing even when the smallest of unknown stray cur-rents are in the process liquids.

    The differential reference is designed to protect thereference element from Br-, I-, CN-, S- and other harshcompounds that react with Ag+. Also protects the ref-erence electrolyte from Hg++, Cu+, Pb+, ClO4 -, or othercompounds that dilute KCl.

    Unique DryLoc design is robust and watertight, en-suring rugged installation.

    Designed to mount in 1 in. standard pipe fittings foreasy installation.

    The preamplified output ensures the process signal isresistant to electrical noise and allows up to 120 m(400 ft) before connection to the instrument.

    Option for blind 4 to 20 mA or digital (S3L) signals forlong cable runs.

    Flat glass surface sensor design that is resistant tofouling and abrasion in dirty applications.

    Large reference volume and replaceable salt bridgeallows the user to rebuild the reference and extendthe service life of the electrode.

    2764-2767pH/ORPElec-trode

    2760Sensor Electronics

    Conductivity/Resistivity Electrodes:Flow-through design ensures continuous measure-ment without air entrapment.

    Reversible threaded connections for in-line integralmount or tank submersion.

    Standard parts offer application flexibility for the user.Short length electrodes available to prevent dead-legs.

    Blind 4 to 20 mA output or digital output for long cableruns beyond 30 m (100 ft), via 2850 sensor electron-ics.

    Every sensor uses standard electrical cable. No needto incur additional costs for patch type cable connec-tions.

    NIST calibration certificate available upon request.

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  • 2800Series Electrodes

    2839-2842 Con-ductivity Elec-trodes

    2850Sensor and Elec-tronics

    Temperature, Pressure and Level SensorsTemperature Sensors:

    Unibody PVDF construction for use in either high pur-ity or aggressive fluid conditions.

    4 to 20 mA or digital (S3L) signal for long cable runsand choice of output.

    Dual threaded 3/4 in. NPT for easy installation.Options for integral mounting of instrument directlyonto sensor.

    Cable and thread permits conduit for full tank submer-sion.

    2350TemperatureSensor

    Pressure/Level Sensors:1/2 in. male union process connection to suit installa-tion needs.

    Three pressure ranges to meet specific requirementsand provide optimal resolution.

    4 to 20 mA or digital (S3L) signal for long cable runsand choice of output.

    Unibody PVDF construction for aggressive fluid condi-tions.

    Option for integral mounting of instrument directlyonto sensor.

    Configure with 8350 transmitter or multi-parametertransmitters or controllers to provide full level measur-ing system (hydrostatic pressure).

    Cable end threads permit conduit for full tank submer-sion.

    2450 Pressure Sensor

    2250 LevelSensor

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  • Systems4630 Chlorine Analyser System

    DescriptionThe Signet 4630 Chlorine Analyser System is an integ-rated all-in-one system designed to measure free chlor-ine. The 3-4630-21 chlorine panel with the optional pHsensor is used to accurately calculate free chlorine inapplications that have varying pH values (0.20 pHunits).In applications where the pH is stable, the pH sensor isnot required and the pH value is manually entered intothe transmitter to calculate the chlorine levels. (-20 ver-sion).The unique integrated clear flow cell combines sensors,flow regulator, filter and variable area flow indicator inone compact unit. An integrated flow regulator with re-movable filter accepts inlet pressures of 1 to 8 bar (15 to120 psi), while maintaining constant flow and minimalpressure to the sensors.Water flows vertically into sensor tip eliminates bubbleentrapment. The flow cell is designed to maintain a min-imum amount of water to ensure sensors stay sub-merged, even when the system and flow is turned off.The Signet 4630 Chlorine Analyser System allows quicksetup and easy installation and is supplied with a 100-240 VAC power supply, two 4 to 20 mA outputs and twodry contact mechanical relays. The flow cell accommod-ates two sensors; one chlorine and an optional pHsensor.

    FeaturesEPA 334.0 compliantReagent free measuringComplete panel system allows for quick and easy in-stallation

    Built-in flow regulator maintains contant flow andpressure to the sensors regardless of inlet pressure

    Pre-wired panel includes a 100-240 VAC power sup-ply, two 4 to 20 mA outputs and two mechanical re-lays.

    Optional automatic pH and temperature compensa-tion

    2630 Amperometric Chlorine Electrode

    DescriptionThe Signet 2630 Amperometric Chlorine electrode is de-signed to measure free chlorine in drinking water andwastewater treatment applications. The electrodes areavailable with a measurement range of 0 to 5 ppm. Thiselectrode requires the Signet 2650 Amperometric Elec-tronics module to communicate with the Signet 8630-3Chlorine Transmitter.Utilizing smart-sensor technology, this electrode has aunique embedded memory chip and can communicate awide variety of information to the Signet 2650 electron-ics and Signet 8630-3 Transmitter.

    Displayed information includes electrode type, factorycalibration data, service time, chlorine range, high andlow pH (with optional Signet pH electrode), temperaturevalues and more.Signets patented DryLoc connector provides quick as-sembly and a secure connection. Gold-plated contactsand an O-ring seal ensure a waterproof and reliable in-terconnect to the Signet 2650 Amperometric Electron-ics. The Signet 2630 Amperometric Chlorine Electrodehas an integrated temperature element for automatictemperature compensation.

    FeaturesEmbedded memory chip accessible via the Signet8630 transmitter

    Quick assembly with Signets patented DryLoc con-nector

    Integrated temperature element for automatic temper-ature compensation

    Separate drive electronics (Signet 2650), for easyelectrode replacement without running new cable

    2650 DryLoc Amperometric Electronics

    DescriptionThe Signet 2650 Amperometric Electronics provide thepolarization voltage and signal conditioning required byall Signet Amperometric Sensors. The 2760 Ampero-metric Electronics also relays important sensor informa-tion that is stored on a memory chip inside the sensorand displayed on the 3-8630-3P transmitter. Informa-tion includes factory calibration data, service life, calib-ration information and more.Signets patented DryLoc connector provides a quickand secure connection to the sensor. Gold-plated con-tacts and an O-ring seal ensure a waterproof and reli-able interconnect to the sensor.Sensor maintenance, replacement and troubleshootinghas never been easier. The DryLoc electronics can beseparated from the sensor, which allows the user to de-tect a faulty sensor, electronics or cable assembly.

    FeaturesPasses the data stored in sensor to the Chlorinetransmitter

    Patented DryLoc connector provides a quick and se-cure connection to the sensor

    Waterproof and reliable interconnect to the sensorEasy sensorreplacement without running new cableEasy sensor removal for servicing

    8630 Chlorine Transmitter

    DescriptionThe Signet 3-8630-3P ProcessPro Chlorine Transmittersimultaneously displays free chlorine and pH levels on abright LCD backlight display.The 8630 transmitter has two 4 to 20 mA outputs thatcan be programed to transmit chlorine, pH or temperat-ure information to a data collection device.

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  • Two dry-contact mechanical relays can be used to deliv-er an alarm signal or activate a chlorine dosing system.Programming is simple and easy with Signets standard4 button keypad. The menu option allows the use ofanoptional pH sensor to accurately calculate free chlorinelevel or select Manual pH input and enterthe applica-tions stable pH level to determine free chlorine levels.

    FeaturesDisplays free chlorine 0 to 5 ppm (mg/l)Two programmable 4 to 20 mA outputsTwo mechanical relaysTemperature and pH CompensationDisplays diagnostic information from sensor memorySimple setup and easy customizationBacklit LCD display

    2750-7 pH Electronics

    DescriptionThe Signet 2750-7 pH Electronics amplify the outputfrom the Signet 2724 pH Electrode and output a Digital(S3L) signal to the Signet 8630 Chlorine Transmitter.Signets patented DryLoc connector provides a quickand secure connection to the sensor. Gold-plated con-tacts and an O-ring seal ensure a waterproof and reli-able interconnect to the sensor.Sensor maintenance, replacement and troubleshootinghas never been easier. The DryLoc electronics can beseparated from the sensor, which allows the user to de-tect a faulty sensor, electronics or cable assembly.

    FeaturesAmplifies the output from the pH electrode to theChlorine transmitter

    Patented DryLoc connector provides a quick and se-cure connection to the sensor

    Waterproof and reliable interconnect to the sensorEasy sensor replacement without running new cableEasy sensor removal for servicing

    4150 Turbidimeter

    DescriptionThe Signet 4150 Turbidimeter system provides accur-ate and reliable compliant water quality monitoring formunicipal and industrial applications.The 4150 measures turbidity via a 90 degree light whichreflects particles as they flow through a small volume,low flow glass cuvette. Air bubbles are eliminated fromthe cuvette by adjusting the backpressure valve on theoutlet tube. The cuvette islocated in a watertight darkchamber for continuously accurate on-line measure-ment. A replaceable desiccantpack provides a dry-stable environment to ensure reliable measurements.Simple and fast calibration can be accomplished in un-der five minutes by placing the In-line glass cuvettefromthe measuring chamber into the cuvette holder while stillin service and the inlet and outlet tubing remains con-nected. The inexpensive calibrationstandard allows for

    dry and multiple system calibrations without mixingchemicals. After calibration, the unit isup and runningwith simple re-insertion of the glass cuvette back intothe measuring chamber.Additional features include a message indicator whenthe desiccant needs replacing and as an option, auto/ul-trasonic cleaning of the glass Inline cuvette for longerruns between maintenance.The 4150 is available in two measuring ranges. The 0 to100 NTU/FNU version is for low range applications suchas drinking water. The 0 to 1000 NTU/FNU range canbe used for various applications including raw water andwastewater reclamation.

    FeaturesSimple and easy single unit installation with built-inpressure regulator

    Versions compliant with either U.S. EPA 180.1 forNorth and South America and Asia or ISO 7027 forEurope

    Time saving and efficiencies of cuvette technologysimplifies calibration

    Spannable 4 to 20 mA outputTwo adjustable alarm relays Bright backlit displayConvenient holder for In-line cuvetteEasy access for wiring and maintenanceUltrasonic cleaning option ensures long and steadyon-line measurement

    Inexpensive standards allow for multiple system calib-rations

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  • Multi Parameter Instruments9900 SmartPro Transmitter

    DescriptionThe Signet 9900 Transmitter provides a single channelinterface for many different parameters including Flow,pH/ORP, Conductivity/Resistivity, Salinity, Pressure,Temperature, Level and other sensors that output a 4 to20 mA signal. The extra large (3.90 x 3.90) auto-sens-ing backlit display features at-a-glance visibility thatcan be viewed at 4-5 times the distance over traditionaltransmitters. The highly illuminated display and largecharacters reduce the risk of misreading or misinterpret-ing the displayed values. The display shows separatelines for units, main and secondary measurements aswell as a "dial-type" digital bar graph.The 9900 is offered in both panel or field mount ver-sions. Both configurations can run on 12 to 32 VDCpower (24 VDC nominal). The 9900 can also be looppowered with compatible sensors.Designed for complete flexibility, plug-in modulesallowthe unit to easily adapt to meet changingcustomerneeds. Optional modules include Relay,Direct Conduct-ivity/Resistivity, H COMM and a PCCOMM configura-tion tool. The unit can be used withdefault values forquick and easy programming or canbe customised withlabelling, adjustable minimumand maximum dial set-tings, and unit and decimalmeasurement choices.

    FeaturesMulti-Parameter input selectionLarge auto-sensing backlit display with at a glancevisibility

    Dial-type digital bar graphIntuitive and user-friendly interface consistent withlegacy Signet ProPoint and ProcessPro devices

    Optional field upgradable relaysSelectable error mode for current outputs,3.6 mA or22 mA

    4 to 20 mA input (with optional 8058 SignalConverter)Warning LED indicatorCustom 13-character label capabilities for the chan-nel type

    Factory reset capabilityOptional PC COMM configuration toolOptional H COMM module for two-waycommunication

    8900 Multi-Parameter Controller

    DescriptionThe Signet 8900 Multi-Parameter Controller takes theconcept of modularity to the extreme. Each 8900 is fieldcommissioned with the users specified combination ofinputs, outputs, and relays using simple-to-install modu-lar boards into the base unit.

    Configure the system selecting either two, four or six in-put channels which accepts any of the Signet sensorsand/or other manufacturer's sensors via a 4 to 20 mAsignal converter (Signet Model 8058). To complete yourunit, choose a power module with universal AC linevoltage or 12 to 24 VDC 10%, regulated.If more features are needed, analogue output and relaymodules are available and easily installed. Plus, the8900 will support up to four additional relays via an ex-ternal relay module.There are other notable features that the 8900 offers.For instance, digital input to the 8900 enables longercable runs and simplified wiring with minimal noise inter-ference. Advanced relay logic allows users to select upto 3 measurement sources to trigger 1 relay. Derivedmeasurements include difference, sum, ratio, percentrecovery, percent rejection, percent passage and BTU.The menu system can be programmed to display inmulti-languages including English, German, French,Spanish, Italian and Portuguese.

    FeaturesMeasures Flow, pH, ORP, Conductivity, Pressure,Level and Temperature

    Multi-language display DIN enclosureUp to 4 analogue outputsUp to 8 relays12 to 24 VDC or 100 to 240 VAC 10%, regulatedpower

    Digital communication allows for extended cablelengths and easy wiring

    Accepts 3rd party 4 to 20 mA output devices whenused with 8058 signal converter

    Available with 1 to 6 channelsTwo BTU calculations

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  • Flow515 Rotor-X Paddlewheel Flow Sensors

    DescriptionSimple to install with time-honored reliable performance,Signet 515 rotor-X Paddlewheel Flow Sensors arehighly repeatable, rugged sensors that offer exceptionalvalue with little or no maintenance. The output signal ofthe Model 515 is a sinusoidal frequency capable of driv-ing a self-powered flowmeter (Model 3-5090). The widedynamic flow range of 0.3 to 6 m/s (1 to 20 ft/s) allowsthe sensor to measure liquid flow rates in full pipes andcan be used in low pressure systems.The Model 515 sensors are offered in a variety of mater-ials for a wide range of pipe sizes and insertion configur-ations. The many material choices including PP andPVDF make this model highly versatile and chemicallycompatible to many liquid process solutions. Sensorscan be installed in up to DN900 (36 in.) pipes usingSignet's comprehensive line of custom fittings. Thesecustom fittings, which include tees, saddles, and weldo-lets, seat the sensor to the proper insertion depth intothe process flow. The sensors are also offered in config-urations for wet-tap and intrinsically safe installation re-quirements.

    FeaturesOperating range 0.3 to 6 m/s (1 to 20 ft/s)Wide turndown ratio of 20:1Highly repeatable outputSimple, economical designInstalls into pipe sizes DN15 to DN900 ( to 36 in.)Self-powered/no external power requiredTest certificate included for -X0, -X1Chemically resistant materials

    525 Metalex Paddlewheel Flow Sensor

    DescriptionThe Signet 525 Metalex Paddlewheel Flow Sensor com-bines stainless steel construction with insertion paddle-wheel technology. The result is a highly reliable sensorsuitable for operation at extreme pressures and temper-atures. The Tungsten Carbide shaft and rulon B (Fluoro-loy B/PTFE) bearing provide excellent wear resistancefor extended service.A comprehensive fitting program allows installation instell lines with the mini-block for small diameters, andeither the mini-tap or saddle for pipes up to DN300 (12in.). The self-generating output signal allows use withthe battery operated flow totaliser 8150.

    FeaturesFor up to 103 bar (1500 psi @ safety factor 1.5) pres-sure

    For up to 149 C (300 F) temperaturesDN15 to DN300 ( to 12 in.) pipe rangeSimple installationSelf-powered/no external power required316 SS body (1.4401)Tungsten Carbide or SS shaft7.6 m (25 ft) cable includeFM approvedOperating range 0.5 to 6 m/s (1.6 to 20 ft/s)

    2536 Rotor-X Paddlewheel Flow Sensors

    DescriptionSimple to install with time-honored reliable performance,Signet 2536 Rotor-X Paddlewheel Flow Sensors arehighly repeatable, rugged sensors that offer exceptionalvalue with little or no maintenance. The Model 2536 hasa process-ready open collector signal with a wide dy-namic flow range of 0.1 to 6 m/s (0.3 to 20 ft/s). Thesensor measures liquid flow rates in full pipes and canbe used in low pressure systems.The Signet 2536 sensors are offered in a variety of ma-terials for a wide range of pipe sizes and insertion con-figurations. The many material choices including PP andPVDF make this model highly versatile and chemicallycompatible to many liquid process solutions. Sensorscan be installed in DN15 to DN900 ( to 36 in.) pipesusing Signets comprehensive line of custom fittings.These custom fittings, which include tees, saddles, andweldolets, seat the sensor to the proper insertion depthinto the process flow. The sensors are also offered inconfigurations for wet-tap installation requirements.

    FeaturesOperating range 0.1 to 6 m/s (0.3 to 20 ft/s)Wide turndown ratio of 66:1Open-collector outputSimple, economical designHighly repeatable outputInstalls into pipe sizes DN15 to DN900 ( to 36 in.)High resolution and noise immunityTest certificate included for -X0, -X1Chemically resistant materials

    2537 Paddlewheel Flowmeter

    DescriptionThe Signet 2537 Flowmeter is the next generation in flu-id measurement technology from the inventor of the ori-ginal paddlewheel flowmeter. This sensor is an improve-ment on whats already an industry standard. It has theadded functionality of various output options includingflow switch, multi-functional pulse, digital (S3L) or 4 to 20mA. Additionally, it offers low flow, low power and high

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  • resolution and can be configured on-site directly throughthe built-in user interface.Installation is simple because the Signet 2537 utilizesthe same fittings as the popular Signet 515 and 2536Paddlewheel Sensors and fits into pipe sizes rangingfrom DN15 to DN200 ( to 8 inches). Available inPolypropylene and PVDF, it is ideal for a variety of ap-plications including chemical processing, water andwastewater monitoring and scrubber control.

    FeaturesDigital (S3L), or 4 to 20 mA outputs or Flow Switch orPulse output (multi-function)

    Allows for up to six sensors to Signet 8900 Multi-Parameter Controller

    Low flow capabilities down to 0.1 m/s (0.3 ft/s)Polypropylene or PVDF sensor bodiesInstalls into pipe sizes DN15 to DN200 ( to 8 in.)Test certificate included for -X0, -X1Low power and high resolution

    2540 Stainless Steel High PerformancePaddlewheel Flow Sensor

    DescriptionThe Signet 2540 Paddlewheel Flow Sensor offers thestrength and corrosion resistance of stainless steel for li-quid applications with low velocity measurements.Unique internal circuitry eliminates the need for mag-nets in the process fluid, enabling flow measurement of0.1 to 6 m/s (0.3 to 20ft/s) while maintaining the advant-ages of insertion sensor design. Rulon B (FluoroloyB/PTFE) bearings and Tungsten Carbide pin provide ex-ceptional wear resistance.The Signet 2540 offers field replaceable electronics andtransient voltage suppression (TVS) to providegreaterimmunity to large voltage disturbances (i.e. lightning)sometimes encountered in field wiring. Sensors can beinstalled in DN40 to DN600 (1 to 24inch) pipes usingthe 1 inch or ISO 7/1-R 1.5 threaded process connec-tion. The sensors are also offered in a hot-tap configura-tion with a bleed valve service without process shut-down in pipes up toDN900 (36 in.). Both styles ofsensors must be used in full pipes and can be used inlow pressure systems.

    FeaturesOperating range 0.1 to 6 m/s (0.3 to 20 ft/s)Field replaceable electronicsNon-magnetic RF detectionStandard NPT or ISO process connectionsHot-tap versions for installation/service without sys-tem shutdown

    For pipe sizes up to DN900 (36 in.)Adjustable sensor-one size for entire pipe range7.6 m (25 ft) cable

    3519 Flow Wet-Tap Valve

    DescriptionThe Signet 3519 Flow Wet-Tap Valve serves as aunique interface between the installation fitting and thewet-tap style Signet 515 or 2536 Rotor-X flow sensor. Itprovides a fast method of removing the sensor from thepipe under specified operating pressures. The PVC andstainless steel design of the Wet-Tap makes it resistantto corrosion and chemical attack by acids, alkalies, salt,and a number of other harsh chemicals.The Signet 3519 Wet-Tap Valve mounts directly ontostandard Signet installation fittings. The 3519 Wet-Tapconsists of a flange and support plate that threadsontothe pipe fitting insert, and a PVC ball valve throughwhich an extended length sensor is inserted into thepipe.

    FeaturesAllows sensor removal without process shutdownPressure release valve for safe sensor removalDual safety lanyardsRugged corrosion resistant PVC construction andstainless steel hardware

    Compatible with Signet 515 or 2536 Rotor-X Wet-TapFlow Sensors

    Eliminates process downtime

    2551 Magmeter Flow Sensor

    DescriptionThe Signet 2551 Magmeter is an insertion style magnet-ic flow sensor that features no moving parts. The paten-ted* sensor design is available in corrosion-resistantmaterials to provide long-term reliabilitywith minimalmaintenance costs. Material options include PP withstainless steel, PVDF with stainless steel, PVDF withHastelloy-C, or PVDF with Titanium.Utilizing the com-prehensive line of Signet installation fittings, sensoralignment and insertion depth is automatic. These ver-satile, simple-to-install sensorsdeliver accurate flowmeasurement over a wide dynamic range in pipe sizesranging from DN15 to DN900 ( to 36 inches), satisfy-ing the requirements of many diverse applications.Signet 2551 Magmeters offer many output options offrequency/digital (S3L) or 4 to 20 mA which are avail-able on both the blind and display versions. The fre-quency or digital (S3L) sensor output can be used withSignets extensive line of flow instruments while the 4 to20 mA output can be used for a direct input toPLCs,chart recorders, etc. Both the 4 to 20 mA outputand digital (S3L) sensor interface is available for longdistance signal transmission. An additional benefit is theempty pipe detection which features a zero flow outputwhen the sensors are not completely wetted. Also, thefrequency output is bi-directional while the 4 to 20 mAoutput can be set for uni- or bidirectional flow using thedisplay or the3-0250 USB to Digital (S3L)Configuration/Diagnostic setup tool which connects toPCs for programming capabilities.

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  • In addition the display version of the 2551 Magmeter isavailable with relays and features permanent and reset-table totalizer values which can be stored andseen onthe display. Also, the display contains multi-languageswith English, Spanish, German, French, Italian and Por-tuguese menu options.

    FeaturesTest certificate included for -X0, -X1, -X2Patented Magmeter technologyNo moving partsBi-directional flowEmpty pipe detectionInstalls into pipe sizes DN15 to DN900 (0.5 to 36 in.)Operating range 0.05 to 10 m/s (0.15 to 33 ft/s)Accurate measurement even in dirty liquidsBlind 4 to 20 mA, digital/frequency, relay outputNo pressure drop corrosion resistant materials; PP orPVDF with SS, Hasteloy-C or Titanium

    Multi-language display menu available

    2552 Metal Magmeter Flow Sensor

    DescriptionThe Signet 2552 Metal Magmeter from Georg Fischerfeatures all-stainless steel construction. The PVDFnosepiece and FPM O-rings are the only other wettedmaterials. The 2552 installs quickly into standard 1 in.or 1 in. pipe outlets, and is adjustable to fit pipes fromDN50 to DN2550 (2 to 102 inches). Two sensor lengthsallow maximum flexibility to accommodate a variety ofhardware configurations, including ball valves for hot-tapinstallations.When equipped with the frequency output, the 2552 iscompatible with any externally powered Signet flow in-strument, while the digital (S3L) output enables multi-channel compatibility with the Signet 8900 Multi-Para-meter Controller. Select the blind 4 to 20 mA currentoutput to interface directly with dataloggers, PLCs ortelemetry systems. Key features include Empty Pipe De-tection, LED-assisted troubleshooting, and bi-direction-al span capability (in 4 to 20 mA models).The Signet 3-0250 USB to Digital(S3L)Configuration/Diagnostic Tool is available to cus-tomize every performance feature in the 2552 so it canbe adapted to the users application requirements.

    FeaturesTest certificate includedAward winning hot-tap magnetic flow sensor up toDN2550 (102 in.)

    Patented Magmeter technologyOperating range 0.05 to 10 m/s (0.15 to 33 ft/s)reliable operation in harsh environmentsRepeatable: 0.5% of reading @ 25 CThree output options: 4 to 20 mA, Frequency, Digial(S3L)

    ISO or NPT threads

    2100 Turbine Flow Sensor

    DescriptionEngineered specifically for small pipe diameter applica-tions, the Signet 2100 Turbine Flow Sensor provides ac-curate readings in two flow ranges: 0.3 to 3.8 lpm and 3to 38 lpm (0.1 to 1 gpm and 0.8 to 10 gpm).The injection-molded PVDF body and ceramic bearingsprovide excellent chemical compatibility and long ser-vice in dosing and batching applications. Union pipingand tubing connections along with removable NEMA 4Xelectronics allow for easy assembly and field replaceab-ility. The 2100 can be used with DN8 ( in.), DN10 (3/8in.), DN15 ( in.) tubing, or DN15 ( in.) piping forsimple installation. End connections are available inPVDF for hose barbs, fusion socket or IR/butt fusion,and in PVC for socket or NPT thread.

    FeaturesOperating range of 0.38 to 38 lpm (0.10 to 10 U.S.gpm)

    Non-magnetic turbineUnion ends for various connector typesEnd connector kits for rigid or flexible tubing or DN15( in.) pipe

    PVDF & ceramic wetted parts provide superiorchemical compatibility

    For use with both clear and opaque fluidsSmall and compact design4.6 m (15 ft) cableFeatures removable electronics that installs froneither side of the sensor

    Sensor mounts at any angle

    2000 Micro Flow Rotor Sensor

    DescriptionThe Signet 2000 Micro Flow Rotor Sensor is construc-ted of Polyphenylene Sulfide (PPS) which provides highmaterial strength. The 2000 offers twoflow ranges start-ing at 0.11 or 1.13 lpm (0.03 or 0.3 gpm), for clean pro-cess liquids, regardless of fluid color or opacity.This sensor can be connected to flexible tubing or rigidpipe, and uses standard hardware for mounting. Only-one moving part and a low pressure drop across thesensor reduces operating costs and maintenancere-quirements.

    FeaturesOperating range 0.11 to 12.11 lpm (0.03 to 3.2 U.S.gpm)

    Simple mounting in. NPT or ISO threads for simple pipe or tubingconnection

    Measures opaque and transparent liquidsLow pressure dropStandard cable 7.6 m (25 ft)

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  • 2507 Mini Flow Rotor Sensor

    DescriptionThe Signet 2507 Mini Flow Rotor Sensor contains afree-running rotor that is driven by the fluid flow.Withinthe given measurement range, the rotational speed ofthe rotor is proportional to the fluid flow rate.Magnets built into the rotor trigger an electronic switchin the top of the sensor creating a square-wave output.Both opaque and transparent fluids can be measuredwith kinematic viscosities between 0.2 to 20.0 centis-tokes.

    FeaturesOperating range 400 to 12,000 ml/m (0.1 to 3.2U.S.gpm)

    Detachable signal connector for easy servicingSimple installation with a G in. ( in. NPT)threaded connection

    Standard 7.6 m (25 ft) cablePVDF constructionCompact assembly

    5075 Totalising Flow Monitor

    DescriptionThe Signet 5075 Totalizing Flow Monitor features a tra-ditional analog dial for flow rate at a glance while thebacklit LCD provides precision flow rate, total volume-and programming information.Significant features of this 5075 include user selectableanalog dials, permanent and resettable totalizers andpulse outputs at sensor frequency and at totalizer scale,The 5075 is powered by virtually any 12 to 24 VDC orVAC 10%, regulated power source.Connect to any of Signets flow sensors for a classicflow meter system.

    FeaturesPermanent and resettable totalizersTamper proof security codeNon-volatile memorySimple push-button operationPulse outputs at sensor frequency and at total volume1/4 DIN, NEMA 4X/IP65Remote totalizer reset

    5090 Sensor-Powered Flow Monitor

    DescriptionThe Signet 5090 Sensor Powered Flow Monitor is thesimplest and most economical instrument in theSignetoffering. It features a balanced-spring metermovement that is powered by the AC output of theSignet 515 Paddlewheel Flow Sensor. No additionalpower sourceis required.

    This unique system is suitable for a wide range of flowrates, and is Factory Mutual (FM) approved for intrinsicsafety without the need for barriers. Packaged in aDIN housing with a NEMA 4X/IP65 front panel, the 5090is the first choice for simple flow monitoring, even in themost demanding industrial environments.

    FeaturesHigh visibility analog displaySensor-powered flow rate indication up to 60 m (200ft) from sensor installation

    Wide flow range: 1 to 20 ft/s in pipe sizes DN15 toD900 ( to 36 in.)

    Single-point calibration from front panelFactory Mutual (FM) approved for intrinsic safety inClasses I, II and III, Division I

    5500 Flow Monitor

    DescriptionThe Signet 5500 Flow Monitor is an instrument thatcomes fully equipped with all of the basic tools neededfor monitoring and controlling a flow system. The ana-log dial enables the user to easily read instantaneousflow rate, while the backlit LCD is useful for calibration,setup, and displaying totalized flow volume. The 5500features a standard DIN package and removable wir-ing terminals. Power the instrument with virtually anystandard 24-volt power supply (AC or DC).Connect any one of Signets wide array of flow sensors,then consider which output features are best for yourapplication.Two dry-contact relays can be configured for High orLow alarm operation, or they can be set to pulse opera-tion for chemical dosing applications.Use the internally powered 4 to 20 mA output, program-mable from the front keypad, to send the flow informa-tion to any PLC or data logger.If you use all of these output features, you still have twomore output pulse terminals, one at sensor frequency,the other triggered by the totalizer. And just for addedconvenience, the resettable totalizer can be reset by aremote hardwired switch, up to 30 m (100 ft), or fromthefront keypad.

    FeaturesPermanent and resettable totalizersTwo programmable relaysFully scaleable active (internally powered) 4 to 20 mAoutput

    Tamper proof security codeNon-volatile memoryIntuitive software designProgrammable pulse outputs

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  • 5600 Batch Controller

    DescriptionThe Signet 5600 Batch Controller provides control cap-ability and process fine-tuning in a familiar package. Theprogramming interface uses a four-button keypad andan intuitive procedure for adjusting a batching system tothe best performance possible.The standard DIN package houses an analog displaypanel that features a batch status indicator with count-up or countdown dials. The backlit LCD displaysflowrate and volume information and batch status, aswell as calibration and setup instructions. The front ofthe unit is NEMA 4X/IP65 and is hard-coated, high-im-pactand UV resistant polycarbonate.The 5600 operates on 12 to 24 volts 10%, regulated,either AC or DC. Removable terminal connections makewiring the 5600 easy. Connect any Signet flow sensorwith a frequency output, then add connections to two re-lays for two-stage shutdown or overrun alarm functions,connect a remote start-stop switch anduse the end-of-batch pulse to trigger the next step in the process. A 4to 20 mA output is also available. Advanced features in-clude a user-set security code,an automatic calibrationoption, and overrun compensation.

    FeaturesPermanent and resettable totalizersNon-volatile memoryEasy batch volume entryRemote start, stop & resumeTwo-stage shutdown controlManual or automatic overrun compensationEstimates time to batch completionOverrun alarm and missing signal alarmAdvanced valve controlEnd-of-batch triggerCount-up or count-down to batch completion

    8150 Battery Powered Flow Totaliser

    DescriptonThe Signet 8150 Battery Operated Flow Totaliser iscompatible with the Signet 515 and 525 flowsensors,and will provide years of dependable operation.The large digital display indicates flow rate and total-ised flow volume simultaneously. One of the three total-isers is resettable from the front panel or a remote loca-tion, while the second resettable totaliser can only be re-set by entering a user-selectable security code. Thethird is a permanent non-resettable totaliser.Our intuitive software design and four-button keypadprovide for simple operation while setting screen dis-plays and programming the system. Calibrationcan beeasily performed by entering the Auto-Cal feature andentering a value to match an external reference. Screendisplays can be modified to suit theusers needs; alongwith the flow rate, any of the three totalisers can be se-lected as the displayed totaliser. Customers can quicklyscroll through the totaliserssimply by pressing any keyon the keypad. A display averaging feature is included

    for applications where the flow in the pipe fluctuates. Forapplications where flowstops and starts due to produc-tion needs, a no-flow indicator will display the hours ofnon-flow.

    FeaturesThree totalizers:2 resettable and 1 permanent, userselectable

    Long-lasting lithium batteriesMounting versatilityNo-flow indicatorLarge digital display with averagingSimple push-button operationUser selectable access code prevents unwantedchanges

    Auto-calibration

    8550 Flow Transmitters

    DescriptionSignet 8550 Flow Transmitters are advanced instru-ments that convert the signal from frequency and digital(S3L) flow sensors into a 4 to 20 mA signal for long dis-tance transmission. Configuration flexibility is maxim-ized with single or dual input/output, two optional relaysfor process control, two packaging options forintegral/pipe mount or panel installation, and scalabilityfor virtually any flow range or engineering unit. State-of-the-art electronic design ensures long-term reliability,signal stability, and simple user setup and operation.

    Features2 or 4 wire powerAvailable with single or dual input/output4 to 20 mA scaleable outputsPermanent & resettable totalizersRelay options availableNEMA 4X enclosure with self-healing windowOutput simulation for complete system testing

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  • pH/ORP2724-2726 DryLoc pH/ORP Electrodes

    DescriptionThe Signet 2724-2726 pH and ORP Electrodes fea-tures a patented reference electrode design and usesthe unique foul-proof patented DryLoc connector. Thelarge area PE reference junction and pathway is con-structed to increase the total reference effectivenessand ensures long service life.The DryLoc connector with corrosion resistant goldplated contacts readily connects the sensor to the mat-ing 2760 preamplifier or the 2750 sensor electronics.The robust Ryton threaded sensor body and choice offlat pH, bulb pH, or flat ORP sensing elements providesbroad range of chemical compatibility for a wide varietyof applications.There are two optional pH sensing versions available,HF and LC. The HF version is for applications wheretraces of hydrofluoric acid (2% or less) will attack stand-ard pH glass in levels of pH 6 and below. The LC ver-sion can be used for low conductivity fluids 20 - 100S/cm nominal and below 20 S when mounted undercontrolled conditions.The quick temperature response is available in either aPT1000 or 3 K temperature sensor and allows com-patibility with all Signet pH/ORP instruments. The 2724-2726 electrodes are general-purpose sensors ideal for awide range of applications. The sensors incorporate inch NPT or ISO 7/1-R 3/4 threads for installing intostandard pipetees. They can also be mounted directlyinto Signet standard fittings, DN15 to System OverviewDN100 ( to 4 inch).

    FeaturesPatented DryLoc connector with gold plated contactsMounts in Signet standard fittings from DN15 toDN100 ( to 4 in.)

    NPT or ISO 7/1-R 3/4 threaded sensors for usewith reducing tees DN15 to DN100 ( to 4 in.)

    Special design allows for installation at any angle,even inverted or horizontal

    Ryton (PPS) body for broad range of chemical com-patibility

    Patented reference design for exceptional perform-ance

    Quick temperature responseHF resistant glass available for trace HF of

  • FeaturesDifferential design for stable measurements in themost aggressive applications

    Long service life even in severe or difficult chemicalapplications

    Water-tight DryLoc connector with foulproof gold con-tacts

    Porous PTFE reference junctionRebuildable reference electrodeSolution groundTemperature sensor (pH)Easy sensor replacement using DryLoc electrodeconnector

    Quick temperature responseCompatible with all Signet instruments and other sup-pliers pH/ORP instruments

    3719 pH/ORP Wet-Tap Assembly

    DescriptionThe Signet 3719 pH/ORP Wet-Tap allows installationand removal of pH or ORP electrodes, even under pro-cess pressure, without the need for process shutdownduring routine electrode maintenance and calibration.Automatic process isolation is achieved during elec-trode retraction with a double O-ring seal on a uniqueand compact retraction assembly; no separate valve isrequired. A patented cam-activated automatic lockingmechanism, SafeLoc, and the short stroke designhelp to assure operator safety. The wet-tap unit can bemounted at any angle and can be used with the SignetDryLoc Wet-Tap electrodes.

    FeaturesElectrode removal without process shutdownSpace saving 45 mm (1.75 in.) short-stroke designSealed pneumatic dampening for smooth and safeoperation

    SafeLoc: Cam- activated automatic locking mech-anism

    Protects electrode sensing surface from breakageSuitable for mounting in any orientationProcess threaded connection NPT or ISOLow profile clampon saddle fittings for convenient in-stallation in ASTM pipe sizes 2 to 12 in.

    2750 DryLoc pH/ORP Sensor Electronics

    DescriptionThe Signet 2750 pH/ORP Sensor Electronics featuringthe DryLoc connector, provides a variety of functions tosuit various requirements.The 2750 has a preamplified signal and features two dif-ferent outputs: a two-wire 4 to 20 mA loop output withEasyCal function or a digital (S3L) output which allowsfor longer cable lengths and is compatible with theSignet 8900 Multi-Parameter Controller.

    The 2750 self-configures for pH or ORP operation viaautomatic recognition of the electrode type. The option-al EasyCal feature allows simple push-buttoncalibrationand includes an LED indicator for visual feedback.The DryLoc electrode connector quickly forms a robustassembly for submersible and in-line installations.NEMA 4X junction enclosures are integralparts of the2750 in-line version and are also available as accessor-ies for the submersible 2750.The 2750 submersible preamplifier can also be used asan In-line preamplifier when used with the 3/4 or 1threaded sensors including the 2724, 2774 and 2764series electrodes. The 2750 In-line preamplifier can beused with Signet fittings up to DN100 (4 in.) and wet-tapassemblies.

    FeaturesIn-line integral mount and submersible installation ver-sions

    Automatic temperature compensationAuto configuration for pH or ORP operationOptional EasyCal calibration aid with automatic bufferrecognition

    Junction boxes for convenient wiring

    2760 DryLoc pH/ORP Preamplifiers andConnectors

    DescriptionThe Signet 2760 pH/ORP Preamplifiers features theDryLoc connector, providing a robust connection toSignet DryLoc electrodes.The 2760 preamplifier allows any DryLoc pH/ORP elec-trode to work with Signet ProcessPro and ProPointpH/ORP instruments. It is also sold as a simple connect-or for use with other manufacturers instruments that donot require a preamplified signal.The DryLoc electrode connector system quickly forms arobust assembly for submersible and in-line installa-tions. NEMA 4X junction enclosures are to extend thepreamplifier cable to long distances.The 2760 submersible preamplifier can also be used asan In-line preamplifier when used with the in. or 1 in.threaded sensors including the 2724, 2774 and 2764series electrodes. The 2760 In-line preamplifier can beused with Signet fittings up to DN100 (4 in.) and wet-tapassemblies.

    FeaturesIn-line integral mount and submersible installation ver-sions

    Automatic temperature compensationAuto configuration for pH or ORP operationJunction boxes for convenient wiring

    5700 pH/ORP Monitor

    DescriptionThe Signet 5700 pH/ORP Monitor is a versatile and in-telligent instrument that recognizes the type of sensorconnected, either pH or ORP, then automatically sets it-

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  • self for the corresponding display and functionality. Also,during EasyCal operation, the monitor automatically re-cognizes standard buffers/test solutions, thereby short-ening and simplifying routine calibration procedures.Two programmable relays and one scaleable 4 to 20mA output are included, and the four-button keypad ar-rangement with intuitive software design is very user-friendly. The monitors require 12 to 24 volts 10%, reg-ulated, AC or DC, and can be used with many SignetpH/ORP electrodes and preamplifiers, or with elec-trodes from other manufacturers by using the 2721Preamplifier. Several useful accessories are available,including the optional splashproof rear cover kit.

    FeaturesDisplays pH/temp/mV or ORP/mVEasyCal simplifies routine calibrationSimple push-button operationIntuitive software designScaleable 4 to 20 mA output internally powered (act-ive)

    Two programmable relaysDual proportional control capabilityNon-volatile memoryVersatile low voltage power requirement

    8750 pH/ORP Transmitters

    DescriptionThe Signet 8750 pH/ORP Transmitter is designed forbroad application and ease of setup and use. The unitautoconfigures for either pH or ORP use when connec-ted to Signet pH or ORP electrodes. Multiple mountingoptions allow for installation best suited to your particu-lar application. The EasyCal menu features automaticbuffer recognition for mistake-proof pH or ORP elec-trode calibrations. Intuitive software and the four buttonkeypad arrangement make it easy to access importantinformation such as pH or ORP, mV input, temperature,calibration, relay setup menus and more.

    FeaturesAutomatic temperature compensationTemperature display in C or FHold and simulate functionsRelay options availableOutput scaleabilityOptional Dual outputNEMA 4X/IP65 enclosure with self-healing windowEasyCal option available

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  • Conductivity/Resistivity2819-2823 Conductivity/ResistivityElectrodes

    DescriptionSignet 2819-2823 Conductivity/Resistivity Electrodesare designed to provide versatile installation and accur-ate sensing across a very broad dynamic range. Theseelectrodes are built with a controlled surface finish to en-sure accuracy and repeatability. The standard electrodeis constructed 316 SS or Titanium, but there are othermaterials available for maximum chemical compatibility.Reversible threads or sanitary flanges allow for maxim-um installation versatility. Sanitary flange versions areavailable with an optional NIST Traceability Certificateto meet USP requirements. Coupled with Signet paten-ted measuring circuitry, a three decade measurementrange is achieved without the need for troublesomeelectrode platinization. A platinum RTD (PT1000) loc-ated within the electrodeallows optimal temperaturesensing.

    FeaturesStandard process connections- in. NPT Polypro- Tri-clamp 1-1 in., 2- Opt. in. NPT 316 SS

    316 SS or Titanium standard electrodeAlternative electrode materials available- Hastelloy-C- Monel

    In-line or submersible mountingNIST traceable certified cells 1% meet USP require-ments

    2839-2842 Conductivity Electrodes

    DescriptionThe Signet 2839-2842 Conductivity/Resistivity Elec-trodes are available in four cell constants from 0.01 to10.0 cm-1, and are suitable for a wide variety of applica-tions from high purity water quality monitoring to weakacids and bases. 316 SS electrode surfacefinishes arecontrolled in a precision bead blasting operation to en-sure measurement accuracy and repeatability. ThePEEK insulator and processconnections are injectionover-molded to minimize variance between electrodes.Double threaded connections in either in. NPT or ISO7/1-R 3/4 enable quick and easy installation in submers-ible or in-line configurations. Transmitter integral mount-ing kit and junction boxes are available as accessories.

    FeaturesDual-threadedCompact electrode length for easy in-line installationin small pipe sizes

    Triple orifice flow through design reduces cloggingand bubble entrapment

    316 SS electrodes with injection molded PEEK pro-cessconnections and insulators

    Cell constants may be traceable to NIST and certifiedto within 1% of value - meets USP requirements

    2850 Conductivity/Resistivity SensorElectronics and Integral Systems

    DescriptionThe Signet 2850 Conductivity/Resistivity Sensor Elec-tronics are available in various configurations for maxim-um installation flexibility. The universal mount version isfor pipe, wall, or tank mounting and enables single ordual (digital versions only) inputs using any standardSignet conductivity/resistivity sensor. The threaded j-boxversion can be used with these same Signet sensors forsubmersible sensor mounting. It is also available as acombined integral system configuration for in-linemounting and includes a conductivity electrode in achoice of 0.01, 0.1, 1.0, or 10.0 cm-1 cell constants. The2850 is ideal for applications with a conductivity range of0.055 to 400,000 S or a resistivity range of 18.2 M to10 k.All 2850 units are available with a choice of two outputs,digital (S3L) or 4 to 20 mA. The digital (S3L) output ver-sion allows for up to six sensor inputs directly into theSignet 8900 Multi-Parameter Controller. The two-wire 4to 20 mA output version is available with eight 4 to 20mA output ranges for each electrode cell constant. Eachrange can be inverted and are field selectable.All 2850 units are built with NEMA 4X/IP 65 enclosureswhich allow output wiring connections with long cableruns of up to 1,000 feet (305 m). EasyCal is a standardfeature that automatically recognizes conductivity testsolution values for simple field calibration. A certifica-tion tool is available for validation of the sensor electron-icsaccording to USP requirements.

    FeaturesIntegral mount systems for quick and easy installationCompact design for maximum installation flexibilityDigital (S3L) interface or two-wire 4 to 20 mA outputEasyCal with automatic test solution recognitionDual channel unit available for low cost installationwith Signet 8900 Multi-Parameter Controller

    For use with ALL Signet conductivity electrodes

    5800CR Conductivity/Resistivity Monitor

    DescriptionThe Signet 5800CR ProPoint Conductivity/ResistivityMonitor features a unique analog/digital display, makingit the preferred measurement instrument for applica-tions requiring routine monitoring.The digital displayguides the user through the simple menu system and

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  • provides precision information, while the analog dialserves as a quick, at-a-glanceindicator of the measure-ment process.The 5800CR offerstwo fully programmable dry contactrelays and a 4 to 20 mA current. The monitor requires12 to 24 VAC or VDC 10%, regulated and is packagedin a convenient DIN, NEMA 4X/IP65 front panel. Theenclosure is hard-coated, high-impact, UV resistantpolycarbonate.In addition to programmable outputs and relays, the unitcan also be set up to measure raw conductivityvalues,meeting USP requirements.

    FeaturesDisplay units: S, mS, k, M, PPM (TDS)Temperature compensationTwo programmable relaysDual proportional control capabilityScaleable 4 to 20 mA outputSimple push-button operationIntuitive softwareNon-volatile memoryCompatible with ALL Signet conductivity electrodes12 to 24 VAC or VDC powerNEMA 4X/IP65

    5900 Salinity Monitor

    DescriptionThe Signet 5900 Salinity Monitor utilizes conductivitysensors to provide direct reading, including calibration,of salinity in parts per thousand (PPT). Equippedwith ascaleable 4 to 20 mA output and two programmable re-lays, the monitor requires 12 to 24 volts, 10%, regu-lated, AC or DC, and is compatible with Signet 10 cm-1or 20 cm-1 conductivity cells.Temperature is selectablefor display in either C or F, and compensation is auto-matic.Calibration is simplified with single-point salinity andtemperature entry via the wet-cal menu sequence. Thefour-button keypad arrangement with intuitive softwaredesign is user-friendly, and is offered with a hard-coated, high impact, and UV resistant polycarbonatefront face. The front panel is rated NEMA 4X/IP65 andan optional splashproof cover is available to protect theback of the instrument.

    FeaturesDirect reading and calibration in PPTDual proportional control capabilityScaleable 4 to 20 mA output (active) internallypowered

    Two programmable relaysTamper-proof security codeAnalog and digital displayNon-volatile memoryCompatible with ALL Signet conductivity electrodesVersatile low voltage power requirementNEMA 4X/IP65

    8850 Conductivity/Resistivity Transmitters

    DescriptionThe Signet 8850 Conductivity/Resistivity Transmitter isdesigned for multiple installation capabilities, simple set-up and easy operation, thus satisfying a broad range ofapplication requirements.Full microprocessor based electronics allow for a wideoperating range and long term signal stability in threedifferent instrument versions: the 8850-1 for a tradition-al two-wire current loop, the 8850-2 features currentloop plus two dry contact relays, or the 8850-3 with two-wire current loop, one sensor input signal and two cur-rent loop outputs. The 8850 is offered with a NEMA4X/IP65 front panel with a self-healing window in a con-venient DIN package for easy mounting. The 8850can be configured via a simple menu system.In addition to programmable outputs and relays, the unitcan also be set up to measure raw conductivity values.

    FeaturesDisplay choices of S, mS, K, M, PPM (TDS)Simulate functionProgrammable temperature compensationRelay and open collector optionsDual output option allows temperature and processsignal transmission

    NEMA 4X/IP65 enclosure with self-healing windowCompatible with ALL Signet conductivity electrodes

    8860 Two-Channel Conductivity/ResistivityControllers

    DescriptionThe Signet 8860 Two-Channel Conductivity/ResistivityController is packed with a set of features and capabilit-ies ideal for the real needs of water treatment applica-tions. It accommodates two separate and independentinput sources and can be powered with AC/DC voltage.The 8860 programs via a simple and intuitive menu sys-tem. The unit can also be programmed to measure araw conductivity value by turning off the temperaturecompensation mode.

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  • To control the process, the 8860 is equipped with fourdry contact relays and three 4 to 20 mA output loops.Calculated measurement include Difference, Ratio or %Rejection. Two of the relays may be converted into opencollector outputs with the flip of a switch. Operatingmodes for the relays and open collector outputs arehigh, or low alarm, pulse, or special USP alarm mode.The 8860 is offered with a NEMA 4X/IP65 front panelwith a self-healing window in a DIN package for easypanel installation.

    FeaturesMeets USP requirements for measuring raw conduct-ivity, USP alarm mode

    Dual sensor inputAC or DC poweredDisplay and/or control: S, mS, PPM or PPB (TDS),k, M, % rejection, difference, ratio,C or F

    Three fully scaleable 4 to 20 mA outputsTwo open collector outputsFour programmable relaysTime delay relay functionProportional pulse control capabilityCompatible with ALL Signet conductivity electrodesProgrammable temperature compensationNEMA 4X/IP65

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  • Temperature/Pressure/Level2250 Submersible Hydrostatic PressureSensor

    DescriptionThe Signet 2250 Hydrostatic Level Sensor for level anddepth control has a one-piece injection molded PVDFbody and ceramic diaphragm for superior compatibilityin corrosive liquids. Utilizing hydrostatic pressure, the2250 disregards false level signals from steam vapors,foam or any other debris on the liquid surface. Twopressure ranges allow for optimal resolution matched toyour sensing needs. Solid state circuitry eliminates drift(no internal potentiometers).Built-in temperature compensation provides outstand-ing accuracy over wide temperature ranges. Thesesensors are available with a proprietary digital output(S3L), or 4 to 20 mA output. The extended cable and ca-pillary tubing with the union connection and a customersupplied conduit, allow submersion in process vessels.

    FeaturesLevel and depth measurement4 to 20 mA or digital (S3L) outputFlush ceramic diaphragmEasy submersible installationChoice of two pressure rangesStandard union connection and extended cable andcapillary tubing (10 m)

    2350 Temperature Sensor

    DescriptionThe Signet 2350 Temperature Sensor has a one pieceinjection molded PVDF body that is ideal for use in highpurity applications. It also outlasts metal sensors in ag-gressive liquids and eliminates the need for costly cus-tom thermowells. These sensors are available with aproprietary digital output (S3L) or field-scaleable 4 to 20mA output.Dual threaded ends ( in. NPT) allow submersion inprocess vessels, or in-line installation with conduit con-nection. An integral adapter kit (sold separately) may beused to create a compact assembly with field mount ver-sions of the Signet 8350 Temperature Transmitter.

    Features4 to 20 mA or digital (S3L) outputStandard in. NPT process connectionOne-piece injection molded PVDF bodyPT1000 platinum RTD in extended tip for quick re-sponse

    Easy installationThreaded for in-line or submersible installation

    2450 Pressure Sensor

    DescriptionThe 2450 Pressure Sensor has a one-piece injectionmolded PVDF body and ceramic diaphragm for superi-orcompatibility in corrosive liquids. Three pressure ver-sions allow for optimal resolution matched to your sens-ing needs. Solid state circuitry eliminates drift (no intern-al potentiometers). Built-in temperature compensationprovides outstanding accuracy over widetemperatureranges.These sensors are available with a proprietary digitaloutput (S3L), or fieldscaleable 4 to 20 mA output. Dual-threaded ends allow submersion in process vessels, orin-line installation with conduit connection. Integral ad-apters (sold separately) may be used to create a com-pact assembly with a field mount version of the Signet8250 Level or 8450 Pressure Transmitter.

    FeaturesTest certificate included4 to 20 mA or digital (S3L) outputStandard in. NPT or in. male union process con-nection

    One-piece injection molded PVDF bodyFlush ceramic diaphragmEasy installationChoice of three pressure rangesPressure or level measurement

    8250 Level Transmitters

    DescriptionSignet 8250 Level Transmitters are compatible with theSignet 2250 Level sensor and 2450 Pressure Sensor.The instrument is available in field and panel mountconfigurations, single or dual-channel input andequipped with one 4 to 20 mA output, fully scale-ableand reversible for each input channel. The unit alsofeatures two relays, plus the ability to support two addi-tional externally mounted relays (for a total offour). Re-lay operation is selectable for High, Low, Window or Off,and includes fully adjustable hysteresis and trigger timedelay. The unit also has the abilityto accept other levelsensors with 4 to 20 mA output via the Signet 8058 Sig-nal Converter. Automatic level-to-volume conversion al-lows display and control of tank volume and/or level inunits such as gallons, kilograms, feet or meters. Simplyenter the dimensions of yourtank or vessel, and the in-strument will calculate volume from the level measure-ment.

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  • FeaturesLevel units for: ft, in., m, cm, %Volume units for: gal., in3, lbs., l, m3, kg, %Available with single or dual inputAdvanced relay control supports up to 4 relaysOutput simulationManual (up to 10 pts.) and automatic level to- volumeconversion

    Display level, volume or bothSpecific gravity entry for use with pressure sensorsand mass unit conversion

    User-selectable averaging for display and outputAccepts other level sensors with 4 to 20 mA output(via 8058 signal converter)

    NEMA 4X/IP65

    8350 Temperature Transmitters

    DescriptionThe Signet 8350 Temperature Transmitter offers local orremote display with current and relay outputs. This mod-el offers exceptional repeatability and accuracyover awide operating temperature range.Configurations in-clude open collector outputs or mechanical relays withstatus indicators for process control or alarming. Theunit also has the ability to accept other temperaturesensors which have 4 to 20 mA output via the Signet8058 Signal Converter. The chemical resistant NEMA4X/IP65 front face is found on both the highly visiblefield mount or black panelmount instruments with a self-healing window and a standard 1/4 DIN cutout. Dual in-put version allows difference calculation (T) and offerscost savingswith independent dual outputs. All modelsoffer an output simulation function for complete systemtesting.

    FeaturesDigital (S3L) input for stable & reliable readingAvailable with single or dual inputField scaleable 4 to 20 mA outputDisplays temperature and mA outputTemperature display in degrees Celsius (C) orFahrenheit (F)

    Choice of relay or open collector outputNEMA 4X/IP65

    8450 Pressure Transmitters

    DescriptionThe Signet 8450 Pressure Transmitter is a unique in-strument that offers local or remote display with currentand relay outputs. This model offersexceptional repeat-ability and accuracy over a wide operating pressurerange. The instrument is available in field and panelmount configurations, single ordual channel input and isequipped with a 4 to 20 mA output, fully scaleable andreversible for each input channel. Configurations in-

    clude open collectoroutputs or relays with status indicat-ors for process control or alarming.The unit also has the ability to accept other sensors with4 to 20 mA output, via the Signet 8058 Signal Convert-er. The chemical resistant NEMA 4X/IP65 frontface isfound in both the highly visible field mount or black pan-el mount instrument, both featuring a self healing win-dow, a standard DIN cutout and large push buttonsfor easy navigation. Programming capabilities are avail-able for single point calibration, setting of relays andoutputs, and output simulationfunction for complete sys-tem testing. The dual input version allows difference cal-culation (P) and offers significant cost savings with in-dependent dualoutputs.

    FeaturesDigital (S3L) input for stable and reliable readingAvailable with single or dual sensor inputPressure can be displayed in psi, bar or kPaField scaleable 4 to 20 mA outputChoice of relay or open collector outputNEMA 4X/IP65Chemical resistant enclosure and self-healing window

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  • Other Products0250 USB to Digital (S3L)Configuration/Diagnostic Tool

    DescriptionThe new 3-0250 USB to (S3L) configuration/diagnostictool interfaces with Signets various digital sensors to al-low users to select all parameters available for modifica-tion, monitor the sensors data on the PC/Laptop, or logthe sensors data to a file. Multilanguage Software inEnglish, German, French, Italian, Portuguese and Span-ish.

    FeaturesUser-friendly interfaceConfigure blind sensorsConfigure all modifiable parameters in the sensorMonitor sensor data or log sensors data to a fileMonitor mV and Temperature reading in pH/ORPsensors

    Graph sensor dataRed and Blue LED indicators for power and datatransmission

    6 ft USB extension cable

    6400 Intrinsic Safety Barriers

    DescriptionGeorg Fischer Signet offers singlechannel intrinsicsafety barriers foruse with the 515 and 525 paddle-wheelflow sensors.Both versions use a inch wide housing which snapsdirectly to a 35 mm DIN rail. Once mounted, an electric-al connection is formed between the barrier and the rail.The rail serves as the intrinsic safety ground bus whenconnected to the designated grounding point. Two addi-tional ground lugs are provided andmay be used as aredundant grounding method or for terminating shields.Each barrier also contains a replaceable 160 mA fusecartridge for each channel. Safety barriers are polaritysensitive devices and are available in +DC and AC-voltage ratings.

    FeaturesOne step, snap-on 35 mm DIN rail mounting andgrounding

    Replaceable 160 mA fuseLowest internal resistanceCommon in. wide housing for single channel ver-sions

    Short-circuit proof connectionsFM, UL, CSA approvedCompatible with Signet 515 and 525 flow sensors

    7300 Switching Power Supplies

    DescriptionSignet 7300 Switching Power Supplies provide regu-lated output voltage in compact and lightweight plastichousings that can be DIN Rail or surface mounted. Theseries includes five different outputcapacities from 300mA to 4.2 A (7.5W to 100W), all of which accept univer-sal AC line voltage input and meet worldwide standardsfor performance and safety. These units meet the powerrequirements for a single system, multiple Signet instru-ments or other devices requiring 24 VDC operation.

    FeaturesRegulated 24 VDC output voltageFive output capacities: 300 mA, 600 mA, 1.3 A, 2.1 Aand 4.2 A

    DIN rail or surface mountUniversal AC input (85 to 264 VAC)DC compatible input (105 to 370 VDC)Fused inputAuto resetting output overcurrent protectionUnique spring-up, finger-safe terminalsShort-circuit protectionOutput voltage adjust (+/- 10%)Light-weight plastic housing

    i-Go 8058 Signal Converter

    DescriptionThe Signet i-Go 8058 Signal Converter accepts any 4to 20 mA signal and converts it into the Signet digital(S3L) format, the serial data format used by the Signet8250, 8350, 8450 and 8900 instruments. When usedwith the 8900 Multi-Parameter Controller, the measure-ment type and operating range are defined in the 8900setup menu. When used with level, temperature andpressure transmitters, the 8058 is configured at the fact-ory to the users specifications.The wire-mount single-channel version is easily moun-ted anywhere in the interconnecting wiring between thesensor and the instrument.The DIN rail mounted dual-channel version can convert one or two separate 4 to 20mA inputs into a digital (S3L)output.

    FeaturesConnects with level, temperature, pressure and multi-parameter Signet instruments and other manufactur-ers transmitters

    Up to two 4 to 20 mA sensor inputsConnects additional measurement parameters toSignet 8900 Multi-Parameter instrument

    Wire or DIN rail mountable

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  • 8059 External Relay Modules

    DescriptionSignet 8059 External Relay Modules supplement theoutput capabilities of certain host instruments such asthe Signet 8900 Multi-Parameter Controller. AC-powered versions accept universal line voltage, andalso provide 24 VDC output that can be used to powerthe host instrument or other device(s).The host instrument controls relay operation by way of asingle digital (S3L) connection. The compact plastichousing is DIN rail mountable and includes LED annun-ciators for each relay, plus one each for power-on anddata transfer or test mode.

    FeaturesExternal relays controlled by host instrumentAC and DC powered versionsDC power output (AC versions)DC power passthrough (DC versions) to simplify wir-ing

    Digital (S3L) passthrough to simplify sensor wiringRed LED annunciators for each relayGreen LED indicators for power and digital (S3L) datatransfer

    Relays may be tested locally, and also via the host in-strument

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  • Calibration AccessoriespH/ORP Buffer Solutions

    DescriptionThe Signet pH buffers are ideal for many calibration re-quirements. The liquid solutions are conveniently pack-aged in one pint bottles; the powder pillows are pack-aged in low weight, single-use containers which can bemixed with water. All pH buffers are color coded foreasy identification; 4.01 pH is red, 7.00 pH isyellow, and10.00 pH is blue.The pH buffers are traceable to NIST standards andcertificates are available upon request. They are accur-ate to within 0.01 pH units @ 25 C and have longterm stability.These solutions are temperature sensitive and areprovided with temperature correction values for the mostaccurate calibration. For applications that requireORPcalibration, the pH 4 and pH 7 buffers can be mixed withquinhydrone powder for the correct measurement val-ues of +87 mV and +264 mV respectively.

    FeaturesNIST TraceableEasily identifiable color coded buffer solutionsLiquid or powder versionsTemperature compensated valuesKits for easy use

    Calibration Kits for 4150 Turbidimeter

    DescriptionThe Calibration Standard kits contain fluids in specialcuvette bottles that are used to compare the clarity ofthe process water against the standard to calibrate thet-urbidity instrument. The standard kits come in two pre-mixed, calibrated ranges.The 0-100 version is generally used for measuring theturbidity of clean, potable water applications. The 0-1,000 version is used to measure water that has aturbid-ity which may exceed 100, such as water in a reclama-tion plant.

    FeaturesStable pre-mixed standards that are certified accurateSealed calibration cuvettesShelf life - 1 yearEasy to follow instructionsKits for easy use

    Formazin Stock Kit for 4150 Turbidimeter

    DescriptionThe Formazin Stock kit contains all chemicals and in-structions to dilute/ mix calibration standardsbetween1.0 and 1980 NTU/FNU. The Formazin Stockkit can be used to calibrate third party turbidity instru-ments as well as the Signet 4150 Turbidimeter.

    FeaturesTurbidity standard for most any valueThree different graduated pipettes includedFour glass cuvettes with light shield capsEasy to follow instructions

    2759 pH/ORP System Tester

    DescriptionThe Signet 2759 pH/ORP Simulator is a battery-powered millivolt generator that simulates pH values of4, 7 and 10, plus ORP values of 700 mV. This deviceis useful as a troubleshooting aid and for general verific-ation of system operation. It is not a substitute for peri-odic system calibration with pH buffers or testsolutions.Accessory adapter cables (sold separately) enable the2759 to connect directly to Signet 2760 preamplifiers,or2750 pH/ORP Sensor Electronics. The adapters in-clude a selector switch for pH (3K or PT1000 Temperat-ure Compensation) or ORP simulation. The switch trig-gers automatic sensorrecognition software in SignetpH/ORP instrumentation.

    FeaturesBattery powered millivolt generatorSimulates pH and ORP valuesHigh impedance input simulates preamplified signalVerifies system functionalityCompatible with 2750 and 2760 preamplifiersConnects to any Signet pH/ORP instrumentVerifies preamplifier or instrument electronics

    Conductivity/Resistivity Tools

    DescriptionThe Signet conductivity/resistivity tools are available forcertification or validation of electronics that are inde-pendent of the electrode. Because there are no avail-able liquid standards for calibration in lowconductivityand resistivity applications, these tools are ideal for vari-ous installations. All tools are built to conform to theASTM D 1125-95 Standard (StandardTest Methods forElectrical Conductivity and Resistivity of Water), whichis also commonly used for USP 24 applications.Signet tools simulate, within 0.1% precision(accuracy), various values: 1.0 S, 2.5 S, 10.0 S,10.0 M, 18.2 M. These tools also temperature com-pensated to 25 C and enable the user to accuratelyvalidate or certify the electronics.Model 2830 can be used with Signet Models 5800CR,8850, and 8860 instruments. The 2850-101-X simulat-ors are used with the Model 2850 electronicsand simplyplugs into the same terminals as the sensor cables.

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  • FeaturesSimulates five different valuesCompatible with all Signet Conductivity/ Resistivity in-struments

    Verifies electronics independent of electrodeNIST traceable unitsTemperature compensated to 25 CAll units ship with NIST traceable certificates

    26

  • InstallationInstallation of Turbidity

    4150 TurbidimeterTurbidity InstallationAn owner's manual is included with every instrumentthat ships. Please refer to this manual for detailed in-structions regarding installation and operation. The in-strument includes a mounting braket designed for the in-strument to mount on a vertical surface.This was made simpler by having pre-drilled mountingholes on a pattern common with instruments used forthis measurement. A pattern hole template is also in-cluded with the instrument when new mounting holesare required.

    Plumbing

    Use 8 mm (5/16 in.) OD, 5 mm (3/16 in.) IDflexibletubing for the water supply connections.

    Opaque tubing (not supplied) should be used to pre-vent algae growth if the tubing will be exposed to sun-light.

    The 4150 requires only 1 psi head pressure to oper-ate.

    The flow through cuvette is rated for a flow of 100mL/m to 1 L/m (0.026 - 0.26 GPM).

    The integral pressure regulator is rated for a maxim-um pressure of 200 psi. It is factory adjusted. Do nottamper with the regulator.

    Inlet water pressure should not exceed 50 psi to avoiddamage to the tubing connection to the regulator.

    Fluid temperature must not exceed 50 C (122 F).The shutoff clamp is used to interrupt the flow duringcuvette maintenance.

    route the sensor drain tubing to a suitable drain. Donot reintroduce the drain sample to the processstream.

    PowerThe power required is 100 - 240 volts AC at 47 - 63 Hz.The output is a single programmable 4 to 20 mA DC in-strument signal that is in direct proportion to the turbid-ity. Also provided are two programmable alarm relayoutputs, one for high process alarm and the other forlow process alarm sense. Note, both alarms are used in

    common to indicate an instrument malfunction, i.e. HighHumidity.

    Calibration and OperationPlease refer to the owner's manual for details.

    Installation of Flow Sensors

    PaddlewheelI. Piping Location

    The correct location of the sensor in the piping sys-tem helps to ensure a proper flow profile in the pipe. Itis important to have sufficient straight pipe immedi-ately upstream of the sensor to create fully de-veloped turbulent flow. Such a flow profile providesthe stability required for the paddlewheel to measureaccurately.

    The diagrams below illustrate the minimum distancesthat are recommended to mount plastic and metalpaddlewheel sensors.

    In all scenarios, it is recommended to choose a loca-tion with as much straight, uninterrupted pipe lengthupstream of the sensor as possible

    Flow Installation Tips:Use Signet fittings for proper insertion into the pro-cess flow.

    Recommended up-stream distances are stated as amultiplier of the I.D. (inner diameter) dimension ofthe pipe. Note that these multipliers are different foreach example and depend upon the upstream ob-struction.

    Paddlewheel sensors can be used for all water-likefluids with little or no particulates (100 micron in dia-meter/length), and non-ferrous, non-fouling innature.

    Always use these sensors in full pipes.Always maximize the distance between sensors andpump sources.

    II. Mounting AnglePaddlewheel sensors are affected by the mountingangle due to the effect of gravity increasing the frictionbetween rotor and bearing surfaces. Air entrapment andsediment within the pipe may also adversely affectsensing accuracy and/or impede operation.Paddlewheels in Vertical pipes:

    Mount the sensor in a pipe with an upward flow. Thisposition is recommended for all scenarios, as it en-sures a full pipe.

    Vertical installations with down-ward flow are gener-ally not recommended.

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  • Paddlewheels in Horizontal pipes:45 from vertical is the recommended sensor mount-ing angle to avoid air bubbles (pipe must be full). Withthe sensor at greater angles, the drag created by therotor resting against the sensor body may comprom-ise performance at the lower end of the operatingrange.

    Straight up installations may experience interferencefrom entrained air at the top of the pipe.

    Inverted installations are often subject to blockagedue to sediments in the pipe. Mounting sensors in thebottom of the pipe is NOT recommended if sedimentsare likely to be in the pipe.

    K-FactorsK-Factors are calibration values (pulses per unit ofvolume) used to convert flow sensor output frequenciesto flow rates. Signet publishes K-Factors for water onlyin gallons (pulses per gallon) and liters (pulses per liter)for all sensors, in all applicable pipe sizes and materials,and/or all applicable installation fitting sizes and materi-als. K-Factors for fluids other than water must be de-termined empirically, typically on-site using a secondarystandard.Note that K-Factors are published for pipe sizes odDN15 to DN300 (0.5 in. to 12 in.). For other pipe sizes,statistical K-Factors may be available. Contact Technic-al Support for more information.

    Flow Installation Tips:Ensure that all wetted materials are chemically com-patible with the process liquid.

    Pressure and temperature ratings are reduced whenplastic flow sensors are mounted in metal pipingsystems.

    The flow sensor is designed to fit tightly into the fit-tings. Lightly lubricate o-rings with a non-petroleumbased lubricant to ease the installation.

    Cut the cable to the desired length if too long. Donot coil extra cable.

    III. Installation FittingsFixed Depth

    The insertion depth of a paddlewheel in a flow stream iscritical and must be achieved and maintained to ensureaccurate flow measurements. Signet installation fittingsfor Rotor-X and Metalex paddlewheel flow sensors setthis depth automatically and facilitate the use of con-venient K-Factors (calibration values) published in thesensor instruction manuals.

    The H-dimension controls the insertion depth and theyare critical for proper seating of the flow sensor into thepipe. These dimensions can be found listed in the flowsensor instruction manuals.515, 2536 and 2537 Rotor-X

    This section outlines the installation fittings availablefrom Signet for the 515, 2536 and 2537 Rotor-X fam-ily of flow sensors. The fitting controls the location ofthe paddlewheel inside the pipe, which in turn determ-ines the calibration constant (K-Factor).

    Refer to the Fittings section of this catalog for a com-plete listing of part numbers.

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  • 525 MetalexThis section outlines the installation fittings availablefrom Signet for the 525 Metalex family of flowsensors. The fitting controls the location of the pad-dlewheel inside the pipe, which in turn determines thecalibration constant (K-Factor).

    Refer to the Fittings section of this catalog for a com-plete listing of part numbers.

    525-1 Metalex Flow Sensor

    The smallest Metalex Flow Sensor (525-1) must be in-stalled into a specially constructed tee fitting with sock-et-weld piping connections.

    525-2 Metalex Flow Sensor

    Use the 525-2 and one of these weld-on fittings forstainless steel pipes from DN32 (1.25 inches) up toDN300 (12 inches) in diameter.

    525-3 Metalex Flow Sensor

    The 525-3 is the longest metalex flow sensor. It re-quires one of the strap-on saddles for pipes from DN50(2 inches) up to DN300 (12 inches) in diameter.

    Consult a qualified welder to install metalex fittings.Use of saddle fittings reduces the pressure rating for the525 sensor.

    IV. Rotor placementProcedure for plastic paddlewheel sensors:

    Hold the sensor upside down and hold the rotor still.1.Place the tip of a medium blade screwdriver betweenthe rotor and the sensor body.

    2.

    Turn the screwdriver blade 90 to flex the ear backjust enough to angle the rotor pin out of one side.

    3.

    Procedure for metal paddlewheel sensors:

    1. With a small pair of needle-nose pliers, firmly grip thecenter of the rotor pin (shaft) and with a twisting motion,bend the rotor pin into an S shape. This should pull theends of the pin out of the retainers and free the rotor as-sembly.

    2. Remove retainer from each side by gently tapping itinwards using a punch. Install a new retainer with its ro-tor pin clearance hole inward. Only install one retainer atthis time.

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  • 3. Insert the new rotor assembly and bearings into therotor housing of the sensor and place the new rotor pin(shaft) through the open end of the rotor housing,through the rotor and bearings, and into the previouslyinstalled retainer.

    4. Tap the second retainer (rotor pin clearance hole in-wards) into the hole while lining up the rotor pin with thecenter of the retainer hole. This completes the rotor re-placement procedure.

    V. Cable glands and conduit adapter kitsCable Glands and Conduit adapter kits are available toinstall on Models 515, 2536, 525 when used in wet en-vironments. These items protect against moisture enter-ing the back end of the sensor. Follow these simple in-structions to prolong the life of the sensor. Conduit ad-apters are included with the 2540 sensors.

    Remove the black Nylon bushing to expose the fe-male threads at the back end of the flow sensor. Usea standard medium size screwdriver to pry the bush-ing up and out of the port. Slide it up and off the en-tire length of the cable, or cut it away carefully so asnot to knick the cable jacket.

    1.

    Thread the gland or conduit adapter over the cableand screw the 1/2 in. NPT male threads into the top ofthe sensor in place of the bushing.

    2.

    For liquid-tight glands, tighten the compression fittingonto the fitting sufficiently to achieve a seal aroundthe cable.

    3.

    For conduit adapters, thread the cable through the ad-apter and tighten the adapter in