供应GASTECGASTEC异丙基苯122DL检测管

产品品牌：GASTEC

产品型号：GASTEC

 异丙基苯C6H5CH(CH3)2检测管122DL
异丙基苯C6H5CH(CH3)2检测管122DL，GASTEC异丙基苯C6H5CH(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。异丙基苯C6H5CH(CH3)2检测管122DL采用自然扩散的方式。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 Range	2 to 500 ppm
Sampling Hours	1 to 10 hours
Detecting Limit	2 ppm (10 hours)
Colour Change	White → Brown
Reaction Principle	Toluene react with formaldehyde to form condensation polymer, which is brown in colour.
Coefficient of Variation	10% (for 20 to 500 ppm-hr)
Shelf Life	2 Years
Corrections for temperature & humidity	Temperature correction is necessary
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences

Substance

Concentration

Interference

Change colour by itself to

Aromatic hydrocarbons		+	Brown
Alcohols, Ketones, Esters	亝 30ppm	No	No

Other substance measurable with this detector tube

Substance

Correction Factor

Sampling Time

Measuring Range

Xylene	Factor: 1.7	1 to 10	3.4 to 850 ppm
Ethyl benzene	Factor: 1.4	1 to 10	2.8 to 700 ppm
Cumene	Factor: 1.7	1 to 10	3.4 to 850 ppm
Benzene	Factor: 1.2	1 to 10	2.4 to 600 ppm
Stylene	Factor: 13	1 to 10	26 to 6500 ppm

Calibration gas generation

Diffusion tube method

TLV-TWA	TLV-STEL	Explosive range
20 ppm	-	1.4 to 6.7%