Battcon Presentation 2014

WhatisyourSensorTellingyou?NotallSensorsarethesame!ShanghaiLOGIndustrialCo.,LtdTEL：021-61311344FAX：[phone]WEB：：[e-mail]ndGassensingcanbeusedforbatteryhealthandsafetySafetyismorecommonespeciallywithhydrogensensorsNTMSensorsareexpertsinceramicmaterials,notinbatteryinstallationandmaintenanceTypesofGasSensorsontheMarketCatalyticbeadSolidstatemetaloxidesemiconductor(MOS)Chemi-resistiveceramicCatalyticBeadSensorWheatstonebridgeresistivecircuitSimplerobustdesignCombustiblegassensorCatalyticreactionwithhydrocarbonsforgasdetectionCatalyticBeadSensorOperatesat400°C–600°CtopromotegasreactionFabricatedtodetectmethanegaswithacorrectionfactorforothercombustiblegases(H2)NeedsO2tooperateHighconcentrationsofcombustiblegasescandamagethesensorSolidStateMetalOxideSemiconductor(MOS)SensorCombustiblegassensorthatcanbemoreselectiveChangeinsemiconductingmaterialsresistanceduetothepresenceofgasMOSSensorOperatesat150°C–400°CtopromotegasreactionandsensorstabilitySelectivecombustiblegassensor,butsusceptibletointerferencegases.FilteringmaterialstoabsorbthesegasesmaybenecessaryNeedsO2tooperateHighconcentrationsofcombustiblegasescandamagethesensorChemi-resitiveCeramicSensorVeryselectivegassensorGasspecificceramicactivelayeroveraninterdigitatedcircuitonaceramicsupportResistancechangesoftheactivelayerindicatesthegasanditsconcentrationElectricalleadsInternalheaterCeramicactivelayerChemi-resitiveCeramicSensorOperatesat200°C-300°CNotcross-sensitivetocombustiblegasesorotherinterferencegasesNeedsO2tooperateHighconcentrationsofcombustiblegasescandamagethesensorSensorTechnologyComparisonTechnologyCross-SensitiveOperatingTemp.DetectionRangeCalibrationIntervalCatalyticYes-10–50°C100%LFL3monthsMOSYes-10–50°C100%LFL3monthsto1yearChemi-resistiveNo-20–80°C100%LFL1YearAtmosphereandContaminantGasesKnownpoisonsandinhibitorstothesensorthatcancausefailure:SomesulfurcompoundsSilicon(commoninlubricantoils,RTVsealants,gaskets)Halogencompounds(refrigerantgases,fireextinguishers)Lossofoxygen,orhighconcentrationsofcombustiblegases/reducingatmospherescanalsodamagethesensor,orcauseinaccuratereadingsConsiderationsforSensorSelectionWhattemperatureswillthesensorsee?Willothercombustibleorinterferencegassesbepresent?Willthesensorbeeasytoaccess?LocationandInstallationHighestpointinaroomNearorabovethebatteries4cornersapproachisanoptionforsomeroomsLocationandInstallationContinuedMoresensors=moredetectionClosetothesourceWhereH2canaccumulateOperationandMaintenanceNosensorismaintenancefreeAminimumcalibrationintervalfortheunitshouldbemaintainedTestingtheunitmorefrequentlycanidentify,andadjustforsensordriftOperationandMaintenanceContinuedLifeLongOperationReplacesensorsRecalibrationwiththemanufacturerCombinereplacementandfactorycalibrationAlarmsandSignalingTypicalalarmsettingsareat1%and2%H2MechanicalrelaysusedtopowerafanOthersignalslikelossofpower,orlossofsignalSummaryAllofthesensortechnologieshaveattributesthatcouldbeanadvantageordisadvantageforaparticularinstallationSelectingthecorrectsensorforyourinstallation,andfollowingmanufacturersinstructionsarethekeyforoptimaloperationofthesensor上海洛耕实业有限公司电话：[phone]传真：[phone]