产品详情
简单介绍:
乙酸检测管81D,GASTEC乙酸检测管81D检测范围0.45-90ppm,检测管检测时间在1-10小时左右。乙酸检测管81D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。
详情介绍:
乙酸检测管81D,GASTEC乙酸检测管81D检测范围0.45-90ppm,检测管检测时间在1-10小时左右。乙酸检测管81D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
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
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
Acetic acid |
NO.81D |
CH3CO2H |
Performance
Measuring Range | 0.5 to 100 ppm |
Sampling Hours | 1 to 10 hours |
Detecting Limit | 0.2 ppm (10 hours) |
Colour Change | Purple → Yellow |
Reaction Principle | CH3CO2H + NaOH → CH3CO2Na |
Coefficient of Variation | 5% (for 5 to 20 ppm-hr), 10% (for 20 to 100 ppm-hr) |
Shelf Life | 3 Years |
Corrections for temperature & humidity | Temperature correction is necessary |
Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences (NOTE)
Substance | Interference | Change colour by itself to |
Hydrogen chloride, Nitric Acid | + | Yellow |
Chlorine, Nitrogen dioxide | + | Yellow |
Hydrogen cyanide, Sulphur dioxide | + | Yellow |
Other substance measurable with this detector tube
Substance | Correction Factor | Sampling Time | Measuring Range |
Formic acid | Factor: 1.1 | 1 to 10 | 0.55 to 110 ppm |
Acetic anhydride | Factor: 0.6 | 1 to 10 | 0.3 to 60 ppm |
Calibration gas generation | Diffusion tube method |
TLV-TWA | TLV-STEL | Explosive range |
10 ppm | 15 ppm | 4 to 19.9% |