Gastec 12L 气体检测管HCN(0.5~150ppm)

Indicator: 2.5 to 60 ppm
Measuring Range: 
+ 0.5 to 1.25 ppm, Number of Pump Strokes 5, 45 seconds per pump stroke
+ 1.25 to 2.5 ppm, Number of Pump Strokes 2, 45 seconds per pump stroke
+ 2.5 to 60 ppm, Number of Pump Strokes 1, 45 seconds per pump stroke
+ 60 to150 ppm, Number of Pump Strokes 1/2, 30 seconds 
Colour Change: Yellow →Pink
Coefficient of Variation: 10% (for 2.5 to 20 ppm), 5% (for 20 to 60 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
0.5 to 1.25 ppm 1.25 to 2.5 ppm 2.5 to 60 ppm 60 to150 ppm
Number of Pump Strokes
5 2 1 1/2
Correction Factor
0.2 0.5 1 2.5
Sampling Time
45 seconds per pump stroke 30 seconds
Detecting Limit 0.1 ppm (n=5)
Colour Change Yellow →Pink
Reaction Principle Hydrogen cyanide reacts with the reagent to form intermediate material which stains indicator pink.
Coefficient of Variation 10% (for 2.5 to 20 ppm), 5% (for 20 to 60 ppm)
Shelf Life 2 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 Concentration Interference Change colour by itself to
Ammonia 2.5 ppm No discolouration
Hydrogen chloride 5.0 ppm + Pink at 5.0 ppm
Nitric acid 10.0 ppm + Pink at 10.0 ppm
Sulphur dioxide 1.0 ppm + Pink at 0.8 ppm
Nitrogen dioxide 10.0 ppm + Pink at 8.0 ppm
Hydrogen fluoride 25.0 ppm + Pink at 21.0 ppm
Hydrogen sulphide 0.5 ppm + Pink at 0.5 ppm
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
Acetone cyanohydrine 1.0 1 2.5 to 60 ppm
Boron trichloride 0.9 1 2.25 to 54 ppm
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
- C 4.7 ppm (2014) 5.6 to 40%

 

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