Hydrogen sulphide

NO.4LT
H2S
Performance
Measuring Range
0.1 to 0.2 ppm 0.2 to 2.0 ppm 2.0 to 4.0 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
1/2 1 2
Sampling Time 1 minute per pump stroke
Detecting Limit 0.05 ppm (n=2)
Colour Change Pale Yellow → Reddish Brown
Reaction Principle

H2S + HgCl2 → HSHgCl + HCl
HCl + Base → Chloride

Coefficient of Variation 10% (for 0.2 to 0.5 ppm), 5% (for 0.5 to 2 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Temperature correction is necessary
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Ammonia   No No
sulphur dioxide   No No
Nitrogen dioxide   No No
Mercaptans 1/10 + Reddish brown
Methyl sulphide   No No
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
10 ppm 15 ppm 4.0 to 44%


Return to previous viewGo to top of page