***CH2:CHCl检测管174D***CH2:CHCl检测管174D，GASTEC***CH2:CHCl检测管174D检测范围1.56-240ppm，检测管检测时间在1-10小时左右。***CH2:CHCl检测管174D采用自然扩散的方式。***CH2:CHCl检测管174D其特点：简洁，轻巧，方便多用、直接读数、不需取样设备。被动扩散式检测管是用来测定较长时间下气体浓度的时量平均值（TWA），采用自然扩散的方式。这种检测管里面填充有吸附剂及反应剂，气体以一定的速率被均匀吸附，从而出现较为明显均匀的变色检测工作场所人员的***气体暴露量时，用右图的检测管夹（710）放置在人员衣领处即可。检测***气体在工作场所的分布时，把该检测管固定放置一段时间后就可检测出来。也可用来进行更长时间的检测1,3-ButadieneNO.174DCH2:CHCH:CH2PerformanceMeasuringRange1.3to200ppmSamplingHours1to8hoursDetectingLimit1.3ppm(8hours)ColourChangeReddishpurple→PalebrownReactionPrincipleCH2:CHCH:CH2+MnO4仺PalebrownproductCoefficientofVariation10%(for10to200ppmr)ShelfLife2YearsCorrecti***fortemperature&humidityTemperaturecorrectionisnecessaryStorethetubesatcoolanddarkplace.PossiblecoexistingsubstancesandtheirinterferencesSubstanceInterferenceChangecolourbyitselftoUnsaturatedhydrocarb***+PalebrownOthersubstancemeasurablewiththisdetectortubeSubstanceCorrectionFactorMeasuringRangeEthyleneFactor:1.21.5to240ppmVinylchlorideFactor:1.21.5to240ppmIsopreneFactor:2.02.5to400ppmTrans-1,2-DichloroethyleneFactor:3.03.8to600ppmCalibrationgasgenerationPermeationtubemethodTLV-TWATLV-STELExplosiverange2ppm-2.0to12%GASTEC|GV-110S|GV-100S|手动气体***AP-20|北川式气体检测管|光明理化气体检测管|日本理化手动气体采样器|北川式气体***GASTEC日本气体快速检知管|便携式气味传感器|气味检测仪迷你型XP-329m|气味传感器XP-329ⅢR|恒流型自动气体采样器GSP-400FT|GASTEC气体采样器)