气体检测探查传感器DEGA NB III LCD GAS DETECTOR.docx

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气体检测探查传感器DEGANBIIILCDGASDETECTORTheDEGANBIIILCDgasdetectorisdesignedforsimpleapplicationswheretheconcentrationofdangerousexplosivesortoxicsubstancescanoccur.ThedetectorisnotintendedfordetectioninindustrialandcommercialareasrequiringATEXcertificationorinareaswithan“Ex”explosionhazard.WerecommendDEGANSIILCDRE(zone2)orDEGANSIIILCDRE(zone1)fortheseareas.Basicgasdetectionmethods:CL–catalyticsensor(Pelistor)Theyoperateontheprincipleofcatalyticcombustion–gasconcentrationismeasuredbasedontheamountofheatreleasedinacontrolledcombustionreaction.Thereactionissupportedbyasuitabletemperatureandthepressenceofacatalyst.Thesesensorscanbeusedtodetectabroadrangeofflammablegases.Thesensorsarecharacterizedbyfastresponse,alonglifetimeandhighstability.Aminimumof10%ofoxygenintheairisrequiredforit’sproperfunction.EL–electrochemicalsensorTheyoperateontheprincipleofchangeofelectricalparametersontheelectrodesstoredinelectrolyte,duetooxidation/reductionreactionsofthedetectedgasonit’ssurface.Thesesensorshavegoodselectivityandtheabilitytodetectverylowconcentrationsoftoxicgases.IL–infraredsensorThetopqualityscanningmethod.Theyoperateontheprincipleofinfraredspectroscopy.Thesensorshaveexcellentselecivityinorganicmatter,donotrequireanyoxygenintheatmoshpereandareresistanttocatalystpoisons(sulfurandsiliconcompounds)whichcauseachangeofsensitivityofcatalyticsensors.Thesensorsarecharacterizedbyhighstabilityandalonglifetime.SL–semiconductorsensorTheyoperateontheprincipleofchangesinelectricalconductivityofsemiconductorsbychangingtheconcentrationofthedetectedgas.Theiradvatageisalonglifetimeinacleanenvironmentandawiderangeofdifferenttypesofgasesandvapors.Theirdisadvatageistheirlowselectivity–thesensorlarglyrespondstoothergasesforwhichitisnotcalibrated. PID–photoionizationsensorThesensitivescanningmethodfordetectionofawiderangeofVOC–volatileorganiccompounds.ThesensordoesnotselectivelydetectallVOCsintheairatconcentrationsinppm.Powervoltage8–28VDCOutput2xswitchingrelaysDegreeofprotectionbycoverIP54Powerconsumption1,2WDimensions100x110x40mm(WxHxD)Weight0,3kgSensortypecatalytic,electrochemical,infrared,photoionization(PID),semiconductorEstimatedsensorlifeinthetransmitterinacleanenvironmentcatalytic/semiconductor(1-2years),electrochemical(1-3years),infrared(5 yearsandmore),photoionization(5000hours)Relativehumidityofthesurroundingair0-95%RHWorkingenvironmentBE1–non-explosiveenvironmentModules:·DEGANBIIIRelayModule (Internal2-relay,250V/10A)Accessories:·DEGANBIIILCDmechanicalcover·DEGANBIIILCDstainlesssteelcover316·DEGAGASINLETNBIII (calibrationattachment)·DEGAWATERCAP (splashguard)·DEGAFUNNEL (funnel)·DEGANBIIISU (replacementsensorunit)