气体分析仪的原理与应用

ParamagneticPhotometricZirconia仕富梅气体分析技术Paramagnetic仕富梅磁氧技术ParamagneticO2O2O2O2O2O2O2O2O2O2O2O2O2O2O2O2COCOCO2CO2SO2HCl

HCl

N2

NO

NO

N2

O2O2COCOCO2CO2SO2SO2HCl

N2

NO2NO2NO2O2O2O2COCOCO2CO2SO2SO2HCl

N2

氧气是唯一对磁场具有很强吸引力的气体,我们称它为“顺磁性”

LED光源

光电池接收器ServomexParamagneticCellParamagnetic磁条充满氮气的球反馈线圈悬浮的镜子Paramagnetic使用一对充满氮气的哑铃来检测氧气哑铃悬浮在一个很强的、不均匀的磁场中Paramagnetic在校验期间，通入氮气使哑铃保持静止位置，从而建立分析仪的零点Paramagnetic样气中的氧气在磁场的作用下，使哑铃发生偏转，由光学反馈系统检测O2O2O2O2O2O2Paramagnetic电流反馈回反馈线圈，产生一个反方向的力距该力距使悬浮回到零位电流正比于氧气的浓度

氧气测量原理样气中的氧气总是设法使得哑铃偏转高精度的反馈回路阻碍哑铃的旋转,给出氧浓度的直接测量值

Paramagnetic仕富梅磁氧技术:

高可靠性

高稳定性

长寿命

高精确度

不受环境气体的影响仕富梅磁氧技术用于........xendos1800/1900...andissuppliedasOEMmodulestoMedicalequipmentmanufacturers.xentra4100xentra49001100A/HPortablesParamagnetic氧分析的原理电化学式顺磁性氧的顺磁性UnpairedelectronsalignwithamagneticfieldandbehavelikesmallmagnetsOxygenmoleculesareattractedintoamagneticfieldNB-Thermalagitationknockselectronsoutofalignmentandreducesmagneticsusceptibility磁氧传感器的类型Magneto-dynamic(Servomex)热/磁风Quinkecell磁风薄的玻璃管气体出口细的铂丝气体入口环形流动室冷态的氧分子受到磁场的吸引磁风测量室的特点热装置容易受到背景气体的导热系数影响TemperaturesensitiveTiltandflowsensitivePressuresensitive(effect=1:1.5)Combustiblesmayburnonfilamentcausingerrors普通的灵敏度QuinkecellQuinkecellfeaturesConstantflowofnitrogenreferencegasrequiredPoorsamplepressuresensitivity-effectofchanges=2:1SuitableforverycorrosivegasesNotaffectedbysamplethermalconductivityServomexparamagneticcellServomexnullbalancesystemMagneto-dynamiccellNullbalancesystem-extremelylinearFastresponse,lowpressureeffect(1:1)VeryhighresolutionTemperaturecompensatedCorrosionresistantmaterialsNotsensitivetothermalconductivityofbackgroundgasesExtremelylonglife-doesnotfail“unsafe”ServomexcellfeaturesEffectofbackgroundgasessmallOperatesupto110C(with1100H)Effectofpressure(1:1)iseasilycompensatedSolventresistantversionavailable(364Ncell)Flammablesamplescanbehandled(ia)electronicsServomex Photometric TechnologiesInfraredGfxServomex Photometric TechnologiesInfraredGfx

SoftUVTransmissionWavelengthEachgasabsorbsenergyintheelectromagneticspectruminauniqueway-itsfingerprint.ServomexPhotometricTechnologiesFingerprintsareusedtoidentifyandanalysespecificcomponentsinasample.InfraredGfxTransmissionWavelengthEachgasabsorbsenergyintheelectromagneticspectruminauniqueway-itsfingerprint.ServomexPhotometricTechnologiesFingerprintsareusedtoidentifyandanalysespecificcomponentsinasample.InfraredGfx

SoftUVServomex Infrared TechnologyInfraredSO2CO2CO58152.0TransmissionWavelength(microns)ServomexSBDWInfraredForthereferencefilter,anabsorptionbandinanareaofthespectrumwherethereisnoabsorptionisselected.Forthemeasurementfilter,anabsorptionbandcorrespondingtotherequiredgasisselected.InfraredServomexInfraredcell

(SingleBeam,DualWavelength-SBDW)FilterwheelIRSource[2-15micron](Broadband,hotwirefilament)ChopperMotorLensSamplecellPyroelectricDetectorLensInfraredWhenthereferencefilterisinthebeam,thereisnoabsorptionbythetargetgasinthesample.Thisgivesazeroreading.ServomexSBDWInfraredRInfraredWhenthemeasuringfilterisinthebeam,energyisabsorbedbythetargetgasinthesample.Thisgivesthespanreading.Thedifferencebetweenthezeroandspansignalsisproportionaltotheconcentrationinthesample.ServomexSBDWInfraredInfraredRMDualBeamIRSensorsDriftresultsfromMeasurementcellcontamination.Ageingdetector,mechanicalmovementSensitiveMicrophonicDiaphramRefrence

CellMeasurementCellInOutRotatingFilterWheelIRSourceCOFilledDetectorServomex Gfx(GasFilterCorrelation) TechnologyGfxServomexGfx

(GasFilterCorrelation)FilterwheelwithgasfilledcellsIRSource[2-15micron](Broadband,hotwirefilament)ChopperMotorLensSamplecellPyroelectricDetectorLensGfxServomexGasFilterCorrelation(Gfx)Somegases-includingCO,CO2,NOandSO2-

haveaspectrumwithafinestructure.Thisallowsitsuseasaspecificandhighlyselectiveopticalfilter.3.558152.5TransmissionWavelengthfinegasstructureGfxWhenthecellfilledwithreferencegas(nitrogen)isinthebeam,thereissomeabsorptionbythetargetgasinthesample.Thisisusedasazeroreading.RGfxServomexGfx

(GasFilterCorrelation)Whenthecellfilledwiththetargetgasisinthebeam,energyisabsorbedbythetargetgasinthesample.Thisgivesthespanreading.Thedifferencebetweenthezeroandspansignalsisproportionaltotheconcentrationinthesample.RMGfxServomexGfx

(GasFilterCorrelation)GasFilterCorrelationHowItWorksUsesagasfiltertoproduceabeamwhichhasalreadyselectivelyabsorbedIRenergyabsorbedbythegastobemeasured,referencedtoabeamwhichhasnot.InfraredAbsorptionLikemanyotherpollutantgases,COabsorbselectromagneticradiationintheinfraredspectrum.TheamountofenergyabsorbedprovidesameasurementoftheCOconcentration.IR

WavelengthAbsorption4.7umCOAbsorbanceInfraredCOSensorsWecanuseaninfraredfiltertoselectonlythosewavelengthscloseto4.7um.IRSourceLensFilterSampleCellDectorInfraredCOSensorsForhighconcentrationCOmeasurements,sensorsusingfilterstoselectthe4.7umregionareideal.ForlowconcentrationCOmeasurementsdualbeamsensorsareoftenused.Thesemeasurementsaresubjecttotwolimitations.CrossSensitivityOthergasesalsoabsorbat4.7umresultingincrosssensitivityerrors.H2OCO2CO4.7umWaveLengthAbsorptionWavelengthstransmittedbyfilter.GasFilterCorrelation.OvercomesbothoftheseproblemsgivingHighsensitivityforlowlevelCOmeasurement.Stable,lowinterferencefrombackgroundgases.IRSpectrumFineStructureTheInfraredspectrumofCOisnotasmoothcurve.WaveLengthAbsorption4.7umLowResolutionAbsorptionspectrumIRSpectrumFineStructureTheInfraredspectrumofCOisnotasmoothcurvebutconsistsofanumberofdistinctlines.WaveLengthAbsorption4.7umHighResolutionDetailBeamspectrumafterNOgasfilterIRSpectrumFineStructureWecanusefiltersfilledwithCOtoselectivelyremoveonlythosewavelengthsdirectlyassociatedwithCO.ThisiscalledGasFilterCorrelationGfxSensorConstructionStableinfraredsourceemitsacollimatedbeamofbroadbandinfraredenergy.WavelengthIntensityGfxSensorConstructionBandpassfilterisolatestheregionoftheIRspectrumofinterestforCO.WavelengthIntensity4.7umGfxSensorConstructionGasfilledcells(Cuvettes)containingCOandN2rotatealternatelyintotheIRbeam.WavelengthIntensity4.7umCOfilledcuvetteN2filledcuvetteGfxSensorConstructionWhenN2cuvetteisinthebeamalloftheIRenergyistransmittedWavelength(expanded)Intensity4.7umCOfilledcuvetteN2filledcuvetteGfxSensorConstructionWhenCOcuvetteisinthebeamthentheIRenergyisremovedonlyatthewavelengthsabsorbedbyCO.Wavelength(expanded)Intensity4.7umCOfilledcuvetteN2filledcuvetteIndividualabsorptionlinesGfxSensorConstructionThealternatingbeampassesdownthesamplecell,throughthegasbeingmeasuredandontothedetector.InOutSampleCellfilledwithgasmeasuredSolidstatedetectorDetectedsignalN2CON2COGfxSensorConstructionThedifferenceinthesignallevelwhenthetwocuvettesareintheIRbeamrepresentsonlytheenergyatthosewavelengthsabsorbedbyCO.InOutDetectedsignalN2CON2COGfxSensorConstructionThesignalsforthetwocuvettesarebalancedelectricallysothatwhenthereisnoCOinthesamplegasthetwolevelsarethesame.InOutDetectedsignalN2CON2CON2CON2COGfxSensorMeasurementsWhenthesamplecontainsnoCOthenthesignalsarebalancedwithnodifference.ThemeasuredCOconcentrationwillbezero.N2CON2CONoCOingassample.GfxSensorMeasurementsWhenthesamplecontainsCOthenthesignalwiththeN2cuvetteisreducedwhilethesignalwiththeCOcuvetteisvirtuallyunchanged.ThedifferencebetweenthesignalsgivestheCOconcentrationinthesamplegas.N2CON2CONoCOingassample.N2CON2CODeltaCOinthegassampleGfxSensorMeasurementsWhenthesamplecontainsanothergaslikeCO2thenthesignalwithbothcuvettesisreducedequally.ThedifferenceinthesignalsiszeroThemeasuredCOconcentrationinthesamplegaswillbezero.N2CON2CONoCOingassample.N2CON2CODeltaCOinthegassampleN2CON2COCO2inthegassampleGfxSensorMeasurementsWhenthesamplecelliscontaminatedorthesourceintensitychangesthenthesignalwithbothcuvettesisreducedequally.ThedifferenceinthesignalsisstillzeroThemeasuredCOconcentrationinthesamplegaswillbezero.N2CON2CONoCOingassample.N2CON2CODeltaCOinthegassampleN2CON2COCellcontaminatedNO,IRfilterandwatervapourspectraPrincipleofoperationServomex SoftUV* Technology

SoftUV*SoftUVislowenergyultravioletradiationgreaterthan250nmServomexSoftUltraVioletcellFilterwheelUVSource[250-900nm](Broadband,hotwirefilament)ChopperMotorLensSamplecellSiliconPhotodiodeDetectorLens

SoftUVTransmission400500600250Wavelength(nm)ServomexSoftUVForthereferencefilter,anabsorptionbandinanareaofthespectrumwherethereisnoabsorptionisselected.

SoftUVForthemeasurementfilter,anabsorptionbandcorrespondingtothetargetgasisselected.

ChlorineWhenthereferencefilterisinthebeam,thereisnoabsorptionbythetargetgasinthesample.Thisgivesazeroreading.ServomexSoftUV

SoftUVRWhenthemeasuringfilterisinthebeam,energyisabsorbedbythetargetgasinthesample.Thisgivesthespanreading.Thedifferencebetweenthezeroandspansignalsisproportionaltotargetgasinthesample.ServomexSoftUV

SoftUVRMServomexPhotometricTechnologies: Reliable Stable Immunetoobscuration Vibrationresistant Solidstatedetector

Gfxoption (superiorselectivityforCO,CO2,NO,SO2)InfraredGfx

SoftUVServomexPhotometrictechnologyisusedin..........andissupplied