***C6H5CH3检测管122DL***C6H5CH3检测管122DL，GASTEC***C6H5CH3检测管122DL检测范围2-500ppm，检测管检测时间在1-10小时左右。***C6H5CH3检测管122DL采用自然扩散的方式。***C6H5CH3检测管122DL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TolueneNO.122DLC6H5CH3PerformanceMeasuringRange2to500ppmSamplingHours1to10hoursDetectingLimit2ppm(10hours)ColourChangeWhite→BrownReactionPrincipleToluenereactwithformaldehydetoformcondensationpolymer,whichisbrownincolour.CoefficientofVariation10%(for20to500ppm-hr)ShelfLife2YearsCorrecti***fortemperature&humidityTemperaturecorrectionisnecessaryStorethetubesatcoolanddarkplace.PossiblecoexistingsubstancesandtheirinterferencesSubstanceConcentrationInterferenceChangecolourbyitselftoAromatichydrocarb***+BrownAlcohols,Ketones,Esters亝30ppmNoNoOthersubstancemeasurablewiththisdetectortubeSubstanceCorrectionFactorSamplingTimeMeasuringRangeXyleneFactor:1.71to103.4to850ppmEthylbenzeneFactor:1.41to102.8to700ppmCumeneFactor:1.71to103.4to850ppmBenzeneFactor:1.21to102.4to600ppmStyleneFactor:131to1026to6500ppmCalibrationgasgenerationDiffusiontubemethodTLV-TWATLV-STELExplosiverange20ppm-1.4to6.7%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)