Offered in 3 level detection ranges from 9.8’ (3m) to •26.2’ (8m)

Configurationissimpleviaintegralpushbutton•displaymodule

Threeprogrammablerelaysforswitch,pumpcontrol•andfail-safety •1pumporvalvewith2alarms •2pumps(lead-lag)with1alarm •2pumps(duplexing)with1alarm •3independentswitchpointalarms

LCDdisplayindicateslevelheightinengineering•unitsandrelaystatus Narrow2”or3”beamwidthforapplicationswithlimitedmeasurementspace Short4”or8”deadbandmaximizesthe measurablefillingcapacityofthetank PVDFtransducerandNEMA4Xpoly- carbonateenclosureforcorrosiveliquids Automatictemperaturecompensation foraccuratemeasurement

EchoSwitch II LU74/77/78 UltrasonicLevelSwitch®

©2010FlowlineInc.•10500HumboltStreetLosAlamitos,CA90720•562.598.3015•www.flowline.com•DS300650REVD

Features Success

Thegeneralpurposeultrasoniclevelsensorprovidescontinuous level detection up to 26.2’ (8m) with 3programmablerelaysforlevelswitchorlevelcontrolfunctions,andisconfiguredviatheintegralpushbut-tondisplaymodule.Eachrelaycanbeconfiguredonasinglesetpoint(highlevelalarmorlowlevelalarm)orlatchedontwosetpointsforautomaticfilloremptyinsimplex(onepumporvalve),duplex(twopumps)ortriplex(threepumps)levelcontrolmodeswithse-lectable timedelayand fail-safe logic.Theembed-ded levelcontrollercan lowercostbyreplacingex-ternalcontrolhardware.Thisnon-contactliquidlevelsensor is ideallysuited forcorrosive,stickyordirtyliquids,andisbroadlyselectedforpumpliftstation,sumpanddaytanklevelapplications.

Application

IP65

Thermalelectricpowerplantsmakeelectricitybyconvert-

ingwaterintohigh-pressuresteamthatdriveturbines.

Usedsteamthenpassesthroughcoolingtowerswhereit

condensesbacktowaterforrecirculation.USpowerplants

drawinmorethan200billiongallonsofwaterperday.

Thereliablemanagementofwatercooling,containment

anddeliveryiscoretotheirprocess.Here,anEchoSwitch

IImulti-pointultrasoniclevelswitch-controllerismounted

overaconcretesump.Thesensormonitorswaterleveland

automaticallyemptiesthesumpwhenfull.

LU74/78

LU77

®

Faceplate

EchoSwitch II LU74/77/78 UltrasonicLevelSwitch ®

©2010FlowlineInc.•10500HumboltStreetLosAlamitos,CA90720•562.598.3015•www.flowline.com•DS300650REVD

InstallthelevelsensorusingFlowline1) installationfittingsorequivalents.

Specifications

Range: LU77:4”to9.8’ (10cmto3m) LU74:8”to18.0’ (20cmto5.5m) LU78:8”to26.2’ (20cm to 8m)Repeatability: 0.25”(6.35mm)Deadband: LU77:4”(10cm) LU74/78:8”(20cm)Beamwidth: LU77:2”(5cm) LU74/78:3”(7.6cm)Configuration: PushbuttonMemory: Non-volatileDisplaytype: LCD,6-digitDisplayunits: Inch,cm,percent, feet or meterLCDindication: LevelandrelaystatusSupplyvoltage: 95-250VACPower: 20watts@120VACContacttype: (3)SPDTrelaysContactrating: 60VA,1AmaximumContactfail-safe:Open,closeorholdlastProcesstemp.: F:-7°to140° C:-20°to60°Temp.comp.: AutomaticAmbienttemp.: F:-40°to160° C:-40°to71°Pressure: MWP=30PSI(2bar)Enclosurerating:NEMA4X(IP65)Encl.material: PolycarbonateEncl.hardware: Brass&stainlessEnclosurevent: WatertightmembraneTrans.material: PVDFConduitentrance: Dual,1/2”NPTProcessmount: LU77:1”NPT(1”G) LU74/78:2”NPT(2”G)Mountgasket: Viton®Classification: GeneralpurposeCompliance: RoHS

Notes

Ordering

Dimensions

Fittings

P/N DescriptionLM52-1400 2”NPTx1”NPT(Sch.40)LM52-2400 3”NPTx2”NPT(Sch.40)LM52-2800 3”NPTx2”NPT(Sch.80)LM52-3800 4”NPTx2”NPT(Sch.80)

LM52-1410 2”Socketx1”NPT(Sch.40)LM52-2410 3”Socketx2”NPT(Sch.40)LM52-3410 4”Socketx2”NPT(Sch.40)LM52-2810 3”Socketx2”NPT(Sch.80)LM52-3810 4”Socketx2”NPT(Sch.80)

LM52-2890 2”NPTBulkheadFitting,PVC

LM50-1001-1 1”NPTBracket,Polypropylene LM50-1001 2”NPTBracket,Polypropylene

For optimum performance, install the level sensor using the belowrecommendedordirectequivalentfittings.

®

LU7 Ordering Notes1) Install the level switch using Flowline installation fittings or equivalents.

Sensor range / size 7 3m (9.8’) 4 5.5m (18.0’) 8 8m (26.2’)Process mount (1) 0 NPT (US) 6 G (metric)

-50 5

LU77SideView

1.9"

(49

mm

)

3.9"

(100

mm

)

5.2" (133 mm)

2.4"

(62

mm

)

1" NPT (1" G)1.25"(32 mm)

LU74/78SideView