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  • 产品名称:二甲苯C6H4(CH3)2检测管122DL

  • 产品型号:122DL
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简单介绍:
二甲苯C6H4(CH3)2检测管122DL,GASTEC二甲苯C6H4(CH3)2检测管122DL 检测范围3.4-850ppm,检测管检测时间在1-10小时左右。二甲苯C6H4(CH3)2检测管122DL 采用自然扩散的方式。二甲苯C6H4(CH3)2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。
详情介绍:
二甲苯C6H4(CH3)2检测管122DL
二甲苯C6H4(CH3)2检测管
122DLGASTEC二甲苯C6H4(CH3)2检测管122DL 检测范围3.4-850ppm,检测管检测时间在1-10小时左右。二甲苯C6H4(CH3)2检测管122DL 采用自然扩散的方式。二甲苯C6H4(CH3)2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有害气体暴露量时,用右图的检测管夹(710)放置在人员衣领处即可。
检测有害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

Toluene

NO.122DL
C6H5CH3 
Performance
Measuring Range2 to 500 ppm
Sampling Hours1 to 10 hours
Detecting Limit2 ppm (10 hours)
Colour ChangeWhite → Brown
Reaction PrincipleToluene react with formaldehyde to form condensation polymer, which is brown in colour.
Coefficient of Variation10% (for 20 to 500 ppm-hr)
Shelf Life2 Years
Corrections for temperature & humidityTemperature correction is necessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences
SubstanceConcentrationInterferenceChange colour by itself to
Aromatic hydrocarbons +Brown
Alcohols, Ketones, Esters亝 30ppm NoNo
Other substance measurable with this detector tube
SubstanceCorrection FactorSampling TimeMeasuring Range
XyleneFactor: 1.71 to 103.4 to 850 ppm
Ethyl benzeneFactor: 1.41 to 102.8 to 700 ppm
CumeneFactor: 1.71 to 103.4 to 850 ppm
BenzeneFactor: 1.21 to 102.4 to 600 ppm
StyleneFactor: 13 1 to 1026 to 6500 ppm
Calibration gas generationDiffusion tube method
TLV-TWATLV-STELExplosive range
20 ppm-1.4 to 6.7%
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