Gastec 12M 气体检测仪HCN氢氰酸测毒管 (17~2400ppm)

Indicator: 50 to 800 ppm
Measuring Range: 
+ 17 to 50 ppm, Number of Pump Strokes 2
+ 50 to 800 ppm, Number of Pump Strokes 1
+ 800 to 2400 ppm, Number of Pump Strokes 1/2
Sampling Time: 1 minutes per pump stroke
Colour Change: Yellow → Red
Reaction Principle: 2HCN + HgCl2 → Hg(CN)2 + 2HCl, HCl + Base → Chloride
Coefficient of Variation: 10% (for 50 to 200 ppm), 5% (for 200 to 800 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
17 to 50 ppm 50 to 800 ppm 800 to 2400 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
1/3 1 3
Sampling Time 1 minute per pump stroke
Detecting Limit 1 ppm (n=2)
Colour Change Yellow → Red
Reaction Principle 2HCN + HgCl2 → Hg(CN)2 + 2HCl
HCl + Base → Chloride
Coefficient of Variation 10% (for 50 to 200 ppm), 5% (for 200 to 800 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
Hydrogen sulphide 500 ppm + Red
sulphur dioxide 500 ppm + Red
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
- C 4.7 ppm 5.6 to 40%

 

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