硝酸檢測(cè)管15D
硝酸檢測(cè)管15D,GASTEC硝酸檢測(cè)管15D檢測(cè)范圍0.8-80ppm,檢測(cè)管檢測(cè)時(shí)間在1-10小時(shí)左右。硝酸檢測(cè)管15D采用自然擴(kuò)散的方式。硝酸檢測(cè)管15D其特點(diǎn):簡(jiǎn)潔,輕巧,方便多用、直接讀數(shù)、不需取樣設(shè)備。
被動(dòng)擴(kuò)散式檢測(cè)管是用來(lái)測(cè)定較長(zhǎng)時(shí)間下氣體濃度的時(shí)量平均值(TWA),采用自然擴(kuò)散的方式。
這種檢測(cè)管里面填充有吸附劑及反應(yīng)劑,氣體以一定的速率被均勻吸附,從而出現(xiàn)較為明顯均勻的變色
檢測(cè)工作場(chǎng)所人員的***氣體暴露量時(shí),用右圖的檢測(cè)管夾(710)放置在人員衣領(lǐng)處即可。
檢測(cè)***氣體在工作場(chǎng)所的分布時(shí),把該檢測(cè)管固定放置一段時(shí)間后就可檢測(cè)出來(lái)。也可用來(lái)進(jìn)行更長(zhǎng)時(shí)間的檢測(cè)
Performance
Measuring Range |
1 to 100 ppm |
Sampling Hours |
1 to 10 hours |
Detecting Limit |
0.5 ppm (10 hours) |
Colour Change |
Yellow → Purple |
Reaction Principle |
HCl + Base 仺 Chloride |
Coefficient of Variation |
10% (for 10 to 100 ppm-hr) |
Shelf Life |
3 Years |
Correcti*** for temperature & humidity |
Temperature correction is necessary
Humidity 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 |
Chlorine |
*** 1/5 |
+ |
Bleaches zero zone |
Nitric acid |
*** 1/5 |
+ |
Purple |
Hydrogen fluoride |
*** 1/1 |
+ |
Purple |
Other substance measurable with this detector tube
Substance |
Correction Factor |
Measuring Range |
Nitric acid |
0.8 |
0.8 to 80 ppm |
Hydrogen fluoride |
2.5 |
2.5 to 250 ppm |
Calibration gas generation |
Diffusion tube method |
TLV-TWA |
TLV-STEL |
Explosive range |
- |
C 2 ppm |
- |
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