德國HEIMANN熱電堆單通道，帶放大器，CO2二氧化碳探測器HIS－A21－F4.26－4PIN單通道帶集成放大器氣體分析熱電堆探測器，波長4.26，可用于大部分CO2的測量。其他波長可訂購。DatasheetHEIMANNSensorIntegratedModuleTO-CaseforGasDetectionCO2-TypeHISA21F4.264PINHeimannanalogsensormodulesarenon-contactthermometerscomprisingahighsensitivethermopilesensorandasignalconditioninganalogcircuitinthesamehousing.ThesignalconditioningASICdeliversanalogvoltagesintherange0to5V.Sensormodulesareavailablewithdifferentopticsandfactorycalibratedtemperatureadjustments.ThedevicescanbesuppliedinTO-39packageswith6connectionsordirectmountedonpcbwithconnector.HEIMANNSensorthermopilemodulesaredesignedforthenon-contacttemperaturemeasurementbasedoninfraredradiation.Athermopilesensorandaself-designedapplicationspecificintegratedcircuit(ASIC)isintegratedinthesensorcase.TheASICisusedforthesensorsignalamplificationandsuppliesasensortemperaturevoltage.Featuresofthespecificsensormoduletype:-CO2detectionby4%gradeinfrarednarrowbandpassfilter-4-pinTO39-case-Sensoramplificationfactor5500-Lineartemperaturereferencewithasensitivityof15mV/ C ApplicationHints TemperatureCalculationandCompensationTheHEIMANNSensorintegratedmoduleHTIAconsistsofafastresponsethermopilesensorandanASICasspecificintegratedcircuitforthesignalprocessingandonchipcalibration.Thethermopilesensorconvertsthetemperatureradiationofanobjectsurfacetoanelectricalsignal(voltage)bythermocouples(Seebeckeffect).Thesensoroutputvoltageisrelatedtotheobjecttemperatureandemissivity(radiation)aswellastothesensorchiptemperature(housingtemperature)andsurroundingtemperature(radiation)bythefollowingequation:VS=K* *(TOn TSn)atTA=TSVS- sensoroutputvoltageK- constantapparatusfactor - objectemissivityTO- objecttemperatureTA- ambient(surrounding)temperatureTS- sensor(housing)temperaturen- exponenttodescribethetemperaturedependencyofthesignalvoltageTheequationissimplifiedbythehypothesisofequalambientandsensortemperatures.Theexponent n hasthetheoreticalvalueof 4 basedonphysicallaws.Butintheapplicationpracticeitisanempiricallydeterminedexponentvaluemostlyintherangeof3..4.Theknowledgeofthehousingtemperatureisnecessarytogettherightobjecttemperaturefromthesensorvoltage.