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INTRODUCTION/TABLEOFCONTENTS StepOne
Offered in liquid and gas sensor types, the general purpose flow switch provides reliable low or no‐flow
detectionofrelativelyclean,non‐coatingmediawithone1Arelayoutput.Liquidexamplesincluedwaterand
aceticacid.AvailableinPolypropylene‐Ryton®orPVDF,theshortflowsensorisusedinpipeorductingfrom
½”to1‐1/2”,andthelongflowsensorisusedin2”andup.Theflowswitchsetpointmaybeadjustedfrom
0.04to3fpsinliquidsor1to90fpsingasesasalow‐flowalarm.Theflowsensorisbestappliedin
applicationswithrelativelyconstanttemperatures.
NewFeatures
RuggedPolypropylene‐Ryton®orPVDFsensorforcorrosiveliquidsandgasses.
AdjustablesetpointwithLEDforfloworno‐flowstatusindication.
60VArelayselectableNOorNCviapowersupplywiringpolarity
SolidStatesensorisnotdamagedbyover‐rangingflowvelocities.
MakeaFail‐SafeSystem:Designafail‐safe system thataccommodates the possibility of switchand/or
power failure. Dwyer Instruments recommends the use of redundant backup systems and alarms in
additiontotheprimarysystem.Addingaredundantalarmswitchtothesystemisacosteffectivemeans
topreventcostlyrun‐dryissues.
TableofContents
Specifications:.........................................................................................................................................................3
Dimensions:.................................................................................................................................................3
SafetyPrecautions:................................................................................................................................................4
Introductions:..........................................................................................................................................................5
Configurations:............................................................................................................................................5
Technology:.................................................................................................................................................5
Installation:.............................................................................................................................................................6
Wiring:.....................................................................................................................................................................7
WiringtoaDwyerInstruments:.................................................................................................................7
WiringtheRelayoutput:.............................................................................................................................8
WiringasaP‐ChannelorN‐ChannelOutput:.............................................................................................9
Calibration:............................................................................................................................................................10
SetPoint:...................................................................................................................................................10
Maintenance: .......................................................................................................................................................11
CleaningProcedure:..................................................................................................................................11
TestingtheSensor(TDSSeriesOnly):.......................................................................................................11
Warranty:..............................................................................................................................................................12