Gastec 71 快速甲硫醇测量探测管 CH3SH (0.25~140 ppm)

Indicator: 5~70ppm
Measuring Range: 
+ 0.25 to 2.5 ppm, Number of Pump Strokes 2 to 10
+ 2.5 to 70 ppm, Number of Pump Strokes 1
+ 70 to 140 ppm, Number of Pump Strokes 1/2
Sampling Time: 1.5 minute per pump stroke
Colour Change: White → Yellow
Reaction Principle: 2CH3SH + PdSO4 → (CH3S)2Pd + H2SO4
Coefficient of Variation: 10% (for 2.5 to 20 ppm), 5% (for 20 to 70 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
0.25 to 2.5 ppm 2.5 to 70 ppm 70 to 140 ppm
Number of Pump Strokes
2 to 10 1 1/2
Correction Factor
1/2 to 1/10 1 2
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 0.1 ppm (n=10)
Colour Change White → Yellow
Reaction Principle 2CH3SH + PdSO4 → (CH3S)2Pd + H2SO4
Coefficient of Variation 10% (for 2.5 to 20 ppm), 5% (for 20 to 70 ppm)
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 Concentration Interference Change colour by itself to
Acetylene, Ethylene 2000 ppm No(two layers) Pale brown
(whole layer)
Carbon Monoxide 2000 ppm No(two layers) Pale brown
( whole layer)
Other Mercaptans   + Yellow
Hydrogen sulphide 500 ppm No No
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
0.5 ppm(2014) - 3.9 to 21.8%

 

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