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Temperature Gauging Systems
S t o r a g e T a n k M e a s u r e m e n t
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The Tank Gauging People
The answer to complete liquid temperatureinformation
Enraf temperature measuring systems make use ofproven technology
and offer the highly efficienttemperature parameter for total
inventory control.Our Multiple Thermo Sensor Thermometer
(MTT)provides:
Accurate product temperature Accurate vapor temperature
Temperature profiles
In combination with SmartRadar and Servo levelgauges, and as
part of Hydrostatic gauging systems,we provide you with accurate
on-line informationincluding:
Liquid levels Water/product interface level Volume Mass
Alarms
All measured and calculated data and parameters areavailable to
higher level systems (DCS, SCADA, MIS,etc.) by means of an extended
number ofcommunication protocols.
Accurate temperature gauging pays back veryquickly!
Enraf introduced a line of very rigid and accuratetemperature
gauging devices.
The Multiple Thermo sensor Thermometer The Spot temperature
thermometers **)
Temperature changes in liquid alter level, volumeand density.
These potential changes maketemperature gauging very important. For
exampleeach 1 C (1.8 F) uncertainty causes a deviation ofmore than
0.1 %. For a storage tank holding50,000 m3 (300,00 bbl) this
results in an uncertaintyof 50 m3 (300 bbl).
Enraf temperature measurement is the result ofalmost 40 years of
innovation.
Continuous development means:
Innovative temperature measurement technology Maintenance-free
temperature gauges Solutions for any application
Characteristics MTT
Measuring range :up to 40,000 mm (131 ft)
Instrument accuracy :Temperature < 0.1 C (0.04 F) *)
Housing material :Nylon, Rilsan # 11Stainless Steel AISI 316 L,
corrugated tube
Operating temperature :
Standard:range -55 C to +135 C (-65 F to +275 F)
High temperature:range -55 C to +200 C (-65 F to +390 F)
Low temperature:range -200 C to +70 C (-330 F to +160 F)
Mounting :In 2", 150 lb or otherFrom tank roof or side
mounted
*) under reference conditions**) through Enraf from third
party
1234
1 compound2 copper (Cu)3 solder connection4 constantane (CuNi)5
shrink sleave
Reliable sealed temperature detectors
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Outstanding accuracy
The inventive use of thermosensors, in combination
with a high class reference resistance, providesoutstanding
accurate measurements. Temperaturemeasurements ensure that
temperature differencescan be detected to within 0.1 C (0.18
F).
Weights & Measures
Enraf developed its temperature gauging systems infull
compliance with international standards.MTT has received full
certification from Custody &Excise and official Weights &
Measures authorities.It meets all international requirements for
custodytransfer.
Unique safety features
Enraf MTTs are approved and meet all internationalsafety
standards for use in hazardous areas.Among its many safety features
is a unique lightningprotection system to avoid damage
duringthunderstorms.
Two wire interface to level gauge
Features
Your Benefits !
Sturdy construction
Electronic element selectorand digital conversion
No moving parts
Versatile mounting configuration
Nylon or Stainless steel
Sixteen measuring poins
Platinum RTD
Efficient, and reliable
No maintenance costs
Very vast and reliable information
A solution for every mounting situation
Preserves life of instrument
Minimal cabling and wiring
Average temperature, profilingand vapor temperature
Accuratye differential measurement
Galvanic lightning protection Safe and reliable in all weather
conditions
Compact and lightweight Easy to install
Temperature at any level
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The Tank Gauging People
TC15
TC14
TC13
TC12
TC0
TC1
TC2
TC3
TC4
CuNi
Pt100
INDUSTRIAL TEMPERATURE MEASUREMENT?
Temperature measurement is particularly importantfor facilities
that store liquids and want stockquantification either by volume or
by mass.Automatic temperature gauging is safe and laborcost
saving.
How to measure temperature?
There are several systems for temperaturemeasurement
available.
Spot temperature measurement
Spot or single point, temperature measurement iscommonly done
with an RTD probe of a definedinsertion length mounted from the
tank wall. A spotelement is, in many cases, able to do the job.
Theposition for a single point temperature probe is veryimportant
for registering the true average producttemperature in a tank.
Average temperature measurement *)
For the volume calculation, it is necessary to knowthe average
temperature of the products totalvolume.
Because most stored liquids do not havehomogenous temperatures,
a more sophisticatedmeasuring system is required.
For example, products loaded into the tank indifferent batches
can have a difference in
temperature.
With the new Multiple Thermosensor Thermometers(MTT), Enraf
supplies a robust and reliableinstrument. It makes use of the most
robustthermocouples available.
A unique differential measuring technique
The accuracy of the MTT is assured by a uniquedifferential
measuring technique.Instead of measuring the absolute
temperature,Enrafs MTT measures the difference compared witha
precision reference platinum RTD located near thebottom of the
assembly. As a result we achieve ameasuring accuracy better than
0.1 C (0.1 8 F).
Each MTT incorporates 16 equally spacedtemperature detectors
which, combined with themultiple temperature interface and
selector, providea true average temperature.As a unique feature,
determination of temperatureprofiles is possible! The MTT also
provides thetemperature of the vapor area which can be usefulin
case of gas storage.
Sturdy nylon (Polyamide) or corrugated stainless steelprotection
tubes with special top and bottom fittings
seal the temperature detectors completely from
theatmosphere.
Advanced techniques continuously monitor and/orcorrect for the
influence of terminal and resistancechanges, thermal voltages and
temperature drift.
A unique measuring principle
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Internal tank data Externaldata
Density
Dens. Ref.(from lab or gauge)
Processpara-
meters
Measure-ment
Tables
DerivedData
Tank Level Temp.
LevelGauge Temp. M
T.C.T. A.S.T.M.
54
G.O.V. V.C.F.
G.S.V.
Mass
Level based Stock Inventory
It is important to understand how the GrossObserved Volume of
the product is determined in alevel based tank gauging system,
althoughtemperature information is also an importantparameter in
Enrafs hydrostatic tank gaugingsystems.
Starting with level, the Gross Observed Volume ofthe product is
determined by utilizing TankCalibration Tables which relate liquid
level to liquidvolume.
Combining the Gross Observed Volumetric quantitywith the liquid
temperature measurement, a GrossStandard Volume can be calculated.
The GrossStandard Volume is the volume at a
referencetemperature.
From the Gross Standard Volume the Mass can becalculated by
introducing the Reference Density. Ingeneral, Volume multiplied by
density equals itsmass.
Installation
MechanicalA two inch entry in the tank is sufficient for
theinstallation. The MTT can be installed eithersuspended in the
tank secured by means of an anchorweight or in a two inch
thermowell.For pressurised applications, a non-slottedthermowell is
recommended. For caverns, we supply
special MTTs adapted to your application.
ElectricalAn average temperature gauging loop consists of anMTT
connected to a Multi-element InterfaceThermosensor converter (MIT)
in most cases mountedin the MTT. The MIT is in turn connected via
onetwisted pair with a temperature processing board ina Enraf Servo
tank gauge, a SmartRadar level gaugeor a Field Display &
Interface (FDI).
*) For installation already equipped with MultipleResistance
Thermometers (MRT) we will be gladto advise for a change to
MTT.
Temperature an important parameter
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The Tank Gauging People
Your guarantee of accuracy and safety at yourplant
Enrafs temperature measuring systems areapproved and fully
certified by numerousorganizations throughout the world,
includingWeight & Measures, Custody & Excise
andMeteorological institutes.Enraf instruments also comply with
regulations setby the worlds leading storage
industryorganizations.
Accreditation include:
CENELEC EuropeUL/FM USACSA CanadaBASEEFA United KingdomPTB
GermanySIM FranceNMI the NetherlandsSEV SwitzerlandBEV/TV
AustriaKDB/Prochem PolandSAA AustraliaSAA CanadaSIRIM MalaysiaGOS
Standard Russia
NEPSI ChinaCCE IndiaMIGAS Indonesia
OIML Organization International de MtrologieLgaleAPI American
Petroleum InstituteCEN Comit Europen de NormalisationISO
International Standardization Organization............. and many
others
Enraf is an ISO 9001 certified companyEnraf products are Y2K
compliant as is Enraf as a
supplier.
In use by companies all over the world
Enraf temperature gauging systems can be found onall types of
bulk storage tanks, storing a huge varietyof liquids. They are the
first choice of many of the
worlds top companies, including:
Petrochemical industriesRefineriesIndependent terminalsMarketing
terminalsPipeline terminalsGas terminalsChemical industriesFood and
beverage industriesAviation fuel supply companiesUtilitiesStrategic
oil & gas storage organizations
For more detailed Information
If you would like more information on the Enraftemperature
gauging systems or any product fromthe Enraf range (a selection is
shown opposite)please contact your nearest Enraf office. Full
contactdetails are given on the overleaf.
The following Enraf Product Sheets are available ontemperature
gauging:
- Multiple Thermo sensor Thermometers (MTT)- Spot temperature
sensors
For a wide range of tanks an liquids
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The complete system
LAN/WAN Ethernet / Tokenring
Entis Pro
CIU Plus
MODBUS
CIU Prime
Field bus
SmartRadar
Servo
HIMS HTG
Entis ProEnrafs new age Windows-NT basedinventory systems
provides superb datafor effective tank farm management.
With there latest technology they havegained official
recognition from officialmeasurement authorities.
Communication Interface UnitsEnraf Communication Interface
UnitCIU Plus and CIU Prime are the mostpowerful tank gauging data
collecting,processing and communication units.
SmartRadarA unique tank gauge with the newestradar technology is
the most advanceddevelopment in non-intrusive levelmeasurement.
SmartRadar gives optimalmeasuring performance in
anyapplication.
Servo GaugesAn intelligent tank gauge for liquidstorage tanks.
The first automatic servogauge to receive certification fromleading
weights & measures authorities.It is very compact and needs
only a smallmounting flange.
Hydrostatic Tank GaugingThe Enraf HTG system is an example
oftrend-setting technology at its best,using high accuracy digital
pressuretransmitters. The best solution for directmass
measurement.
Hybrid Inventory Management SystemsThe Hybrid Inventory
ManagementSystem (HIMS) brings together the bestof servo tank
gauging or SmartRadarwith digital pressure transmitter to
provide maximum accuracy in level, mass,density and volume.
Other instruments in the Enraf range WaterScout for
product/water
interface measurement Portable Enraf Terminal (PET) for easy
commissioning and field configuration Indicators for data
display in the
field or any location Securiterre for any grounding
application as road trucks, trains, etc. AlarmScout to prevent
overfill and
spills. It detects liquids, slurries, foam aswell as interfaces
(e.g. oil/water).
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TheTankGaugingPe
ople
Enraf B.V.Rntgenweg 1, 2624 BD DelftP.O. Box 812, 2600 AV
Delft
The NetherlandsTel.: +31 (0)15 269 86 00, Fax: +31 (0)15 261 95
74Email: [email protected]://www.enraf.com
China: Enraf B.V. (Shanghai Rep. Office)# 18-01, Suncome Liauw's
Plaza,738 Shangchen Road, Pudong, Shanghai 200120Tel.: +86 21
58311611, Fax: +86 21 58313011
France: ENRAF S.a.r.l.ZAC Les Beaudottes, 15 rue Paul
Langevin,
93270 SEVRANTel.: +33 (0)1 49 36 20 80, Fax: +33 (0)1 43 85 26
48
Germany: Enraf GmbHObere Dammstrasse 10, 42653 SolingenPostfach
101023, 42648 SolingenTel.: +49 (0)212 58 750, Fax: +49 (0)212 58
7549
Singapore: Enraf B.V. (Singapore Rep. Office)Lam Soon Industrial
Building63 Hillview Avenue, # 05 - 03, Singapore 669569Tel.: +65 76
94 857, Fax: +65 76 94 348
United Kingdom: Enraf Ltd.Unit 11, Sandridge Park, Porters
WoodSt. Albans, Herts AL3 6PHTel.: +44 (0)1 727 843 376, Fax: +44
(0)1 727 842 185
USA: ENRAF Inc.500 Century Plaza Drive, Suite 120Houston, Texas
77073Tel.: +1 281 443 4291, Fax: +1 281 443 6776
Russia: Enraf B.V. (Moscow Rep. Office)c/o Nucletron -
Oldelft2nd Donskoy Proezd, Building 6/4117071 MoscowTel.: +7 095
935 7877. Fax: +7 095 935 7877
vW-IN-4416.026-V2.0
