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简单介绍
1DL的详细介绍
1DL
1DL,GASTEC1DL检测范围0.4 to 400 ppm,检测管检测时间在1-10小时左右。
1DL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
Carbon monoxide | DL |
CO |
Performance
Measuring Range | 0.4 to 400 ppm | |
Sampling Hours | 0.5 to 24 hours | |
Detecting Limit | 0.2 ppm (24 hours) | |
Colour Change | Pale Yellow → Brown | |
Reaction Principle | CO + Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3 | |
Coefficient of Variation | 10% (for 10 to 200 ppm-hr) | |
Shelf Life | 2 Years | |
Corrections for temperature & humidity | Unnecessary | |
Store the tubes in the refrigerator to keep at 10oC (50oF) or below. |
Possible coexisting substances and their interferences
Substance | Concentration | Interference | Change colour by itself to |
Nitrogen 倣onoxide | 亝 1/10 | No | No |
Sulphur dioxide | 亝 1/1 | No | No |
Nitrogen dioxide | 亝 1/20 | No | Brown |
Calibration gas generation | High pressure gas cylinder method |
TLV-TWA | TLV-S | Explosive range |
25 ppm | - | 12.5 to 74% 订购 |
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