产品简介 美国2B公司的205型双光束紫外光臭氧分析仪，采用最新技术的254nm紫外双光束光源技术及设计，可以同时测量被测样品臭氧值及去臭氧的净化空气值。结合其它专利技术设计，205型双光束紫外光臭氧分析仪的测量响应时间仅需2秒，成为市场上最快响应时间的臭氧分析仪。仪器量程由1ppbv至100ppmv。该仪器具有高精度(1ppb)、体积小、重量轻(5磅,2.3kg)及耗电量低。特别适合使用于航天及汽球上的大气臭氧测量。 特点： 使用双束254nm紫外光吸收法 高精度及分解度，量程由1ppbv至100ppmv 2秒响应时间，较同类型产品优越 低电量消耗，能以12VDC(5.0W)外置电源操作 DewLineTM技术减低水气对仪器的干扰 内置数据记录功能及实时时钟显示。并有3组仿真讯号输出 以RS-232输出时间、日期、臭氧浓度、仪器内温度、气压及另外3组补充轮入讯号，例如外置温度、湿度及气压 模拟输出0-2.5V 选配GPS功能及CF记忆卡 应用： 气球及航空的大气测量 建立遥控监测网络 建立城市监测网络 个人及工作环境监测 工业生产中监测 产品规格： 操作原理 双光束紫外光254nm灯 量程 1ppbv~100ppmv 精度 2% 采样时间 2秒、10秒、1分钟、5分钟及1小时 记忆容量 20,480组 输出 数码显示，0~2.5V，RS-232 流量 大约1L/min 尺寸/重量 90 210 290mm/4.7磅 电源 12VDC交流电 TheModel205OzoneMonitor makesuseoftwodetectioncellstoimproveprecision,baselinestabilityandresponsetime. IntheDualBeaminstrument,UVlightintensitymeasurementsIo(ozone-scrubbedair)andI(unscrubbedair)aremadesimultaneously.Combinedwithotherimprovements,thismadeitpossibletoreducethetimebetweenozonemeasurementsto2seconds,makingourinstrumentthefastestUV-basedozonemonitoronthemarket,whilestillretainingthesmallsize,weightandpowerrequirementsofourpopularModel202OzoneMonitor. Fastmeasurementsareespeciallydesirableforaircraftandballoonmeasurementswherehighspatialresolutionisdesired. Alternatively,onecanchoosetoaveragemorepointsinternallytoobtainevenbetterprecision. TheModel205hasallofthefeaturesoftheModel202,includingchoiceofaveragingtime(2s,10s,1min,5min,1hr),analogoutput(0-2.5V),realtimeserialoutput,internaldataloggerwith3analoginputsforsimultaneousloggingofothermeasurements(e.g.,T,PandRH),realtimeclock,andoptionalflashmemory. SchematicDiagram Features Backupsamplingpumpandflowmeter(nowstandard);iftheflowratedropsbelowacriticalvalue,thebackuppumpisactivatedandanindicationdisplayedontheLCD Internaldatalogger(EEPROM),logs14,336linesofdata Realtimeclock Bothserialanduser-scaleableanalogvoltageoutputs(5-20mAcurrentoutputoptional) Three0-2.5VDCanaloginputsforloggingothermeasurements,suchasexternaltemperature,pressureandhumidity Convenientuserinterfacetomicroprocessor,includingcalibrationparameters(gainandzero) Selectabledataaveragingtimesof10s,1min,5minand1hr(customaveragingtimesavailable) DewLine foreliminationofanywatervaporinterference,auniquefeatureof2BTechinstruments Options FlashCardMemoryforvirtuallyunlimited,portabledatastorage GPSforcontinuousloggingoflatitude,longitudeandaltitude Rechargeablemetalhydridebatteryprovides12hrofcontinuousoperation Externalparticlefilter Serial-to-USBadapter Rotaryvaneairpumpforlowtemperatureandquietoperation Externalairpumpforlongpumplife Specifications MeasurementPrinciple UVAbsorptionat254nm;DualBeam LinearDynamicRange 1.0ppbto250ppm Resolution 0.1ppb Precision(1 ;rmsnoise) Greaterof1.0ppbor2%ofreading Accuracy Greaterof1.0ppbor2%ofreading LimitofDetection(2 ) 2.0ppb NIST-TraceableCalibration Yes MeasurementInterval 2s(Dataaveragingoptions:2s;10s,1min,5min,1hr) FlowRate(nominal) ~1.8Liter/min FlowRateRequirement 1.2L/min BaselineDrift 1ppb/day 3ppb/year SensitivityDrift 1%/day 3%/year MeasurementTime,Frequency 2s,0.5Hz ResponseTime,100%ofStepChange 4s,2points AveragingTimes 2s,10s,1min,5min,1hr DataStorage 14,336lines(10savg.=1.4days;5minavg=1.4mo.) OzoneUnits ppb,ppm,pphm,mgm-3,mgm-3 PressureUnits mbar,torr TemperatureUnits C,K TandPCorrected Yes OperatingTemperatureRange 0to50 C;-20to50 Cwithlowtemperaturemodifications(rotaryvanepumpandlampheater) OperatingAltitudeRange ~0-30km(~30-1000mbar) PowerRequirement; Suppliedbybatteryor110/220VACPowerPack 12Vdcor120/240Vac,415mA,5.0watt(3.9wattwithcellheaterunplugged) Size 3.5x8.5x11inches(9x21x29cm) Weight 4.7lb(2.1kg);1.6lb(0.7kg)withoutinstrumentcase DataLoggerCapacity 14,336lines(10savg.=1.4days;1minavg=10days;5minavg=1.4mo; 1hravg=1.6yr AnalogInputsforInternalLoggingofOtherInstruments 3AnalogInputs,0-2.5V;Forexample,couldlogexternalT,PandRH DataOutputs RS232,0-2.5VAnalog,LCDDisplay;ExternalUSBConverter:(Optional4-20mACurrent;requestquote) DataTransferBaudRates 1200,2400,4800,19200 OutputRanges UserDefinedScalingFactorinMenu DewLine Yes BackupAirPump Yes FlowMeter Yes Options GPS,FlashCardMemory,4-20mACurrentOutput;LampHeater;RotaryVaneAirPump;Long-LifeExternalAirPump;RackMountCase SystemIncludes Model205OzoneMonitor ACPowerAdapter(100-240VACto12VDC) withCountry-SpecificPlug CigaretteLighterAdapter BatteryWireConnector ZeroingCartridge OperationManualonCD CalibrationDataandNIST-TraceableCalibrationCertificate InstrumentBirthCertificate OneYearWarranty TodownloadabrochuredescribingtheModel205OzoneMonitor (PDFformat),clickonthedownloadbuttonbelow.