Gastec 4LT 硫化氢气体检测毒管快速H2S检知管H2S(0.1-4 ppm)

Indicator: 0.2~2.0ppm
Measuring Range: 
+ 0.05 to 0.1 ppm, Number of Pump Strokes 2
+ (0.1) to 2.0 ppm, Number of Pump Strokes 1
+ 2.0 to 4.0 ppm, Number of Pump Strokes 1/2
Sampling Time: 1.5 minute per pump stroke
Colour Change: Yellow →Pink
Coefficient of Variation: 5% (for 0.1 to 2.0 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tube

Performance
Measuring Range
0.05 to 0.1 ppm (0.1) to 2.0 ppm 2.0 to 4.0 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
0.5 1 2
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 0.01 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 0.1 to 2.0 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Unnecessary
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 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 0.05 ppm + Pink at 0.05 ppm
Nitric Acid 6.0 ppm + Pink at 5.0 ppm
Sulphur Dioxide 10times +(dual layer) Pale pink at 2.0 ppm
Nitrogen Dioxide 5times Pink at 6.5 ppm
Hydrogen Fluoride 12.0 ppm + Pink at 11.0 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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