Gastec 192 便携式气体检测管甲基丙烯腈检测管(0.2~32ppm)

Indicator: 0.5 to 10 ppm
Measuring Range: 
+ 0.2 to 0.5 ppm , Number of Pump Strokes 4
+ 0.5 to 10 ppm, Number of Pump Strokes 2
+ 10 to 32 ppm , Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: Yellow → Red
Reaction Principle: 
+ CH2:C(CH3)CN+ Cr6+ + H2SO4 → HCN
+ 2HCN + HgCl2 → 2HCl+Hg(CN) 2
+ HCl+Base → Chloride
Coefficient of Variation: 10% (for 0.5 to 2 ppm), 5% (for 2 to 10 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
0.2 to 0.5 ppm 0.5 to 10 ppm 10 to 32 ppm
Number of Pump Strokes
4 2 1
Correction Factor
0.4 1 3.2
Sampling Time 2 minutes per pump stroke
Detecting Limit 0.1 ppm (n=4)
Colour Change Yellow → Red
Reaction Principle CH2:C(CH3)CN+ Cr6+ + H2SO4 → HCN
2HCN + HgCl2 → 2HCl+Hg(CN) 2
HCl+Base → Chloride
Coefficient of Variation 10% (for 0.5 to 2 ppm), 5% (for 2 to 10 ppm)
Shelf Life 3 Years
Corrections for temperature & humidity Unnecessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Nitriles (C3)   + Red
Acetone cyanohidrin   + Red
Alcohols, Esters, Ketones 20 ppm No
Aromatic hydrocarbons 20 ppm No
Hydrogen chloride,
Hydrogen cyanide
  No No
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
1 ppm(2014) - -
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