Gastec 4LB 快速硫化氢测量探测管H2S(0.5-12ppm)

Indicator: 1 to 6 ppm
Measuring Range: 
+ 0.5 to 1 ppm, Number of Pump Strokes 2
+ 1 to 6 ppm, Number of Pump Strokes 1
+ 6 to 12 ppm, Number of Pump Strokes 1/2
Sampling Time:  1 minutes per pump stroke
Colour Change: Yellow → Pink 
Coefficient of Variation: 5% (for 1 to 6 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
0.5 to 1 ppm 1 to 6 ppm 6 to 12 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
0.5 1 2
Sampling Time 1 minute per pump stroke
Detecting Limit 0.07 ppm (n=2)
Colour Change Yellow → Pink
Reaction Principle

Hydrogen Sulphide reacts with the reagent to form intermediate material which stains indicator pink

Coefficient of Variation 5% (for 1 to 6 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Unnecessary
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Ammonia 2.3 ppm No discolouration
Ethyl Mercaptan 0.5 ppm + Pink at 0.4 ppm
Hydrogen Chloride 4.5 ppm + Pink at 4.0 ppm
Hydrogen Cyanide 0.1 ppm + Pink at 0.1 ppm
Nitric Acid 6.0 ppm + Pink at 5.0 ppm
Sulphur Dioxide 1.0 ppm + Pale pink at 0.7 ppm
Nitrogen Dioxide 3.5 ppm Pink at 8.0 ppm
Hydrogen Fluoride 13.0 ppm + Pink at 10.0 ppm
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
1 ppm (2014) 5 ppm (2014) 4.0 to 44%

 

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