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主页 有毒有害气体快速检测管（用泵） Gastec 4H 快速硫化氢测量探测管H2S（10-4000ppm）

Gastec 4H 快速硫化氢测量探测管H2S（10-4000ppm）

Indicator: 100 to 2000 ppm
Measuring Range: 
+ 10 ~ 100 ppm, Number of Pump Strokes 2 to 10
+ 100 ~ 2000 ppm, Number of Pump Strokes 1
+ 2000 ~ 4000 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: White → Brown
Reaction Principle: H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
Coefficient of Variation: 5% (for 100 to 2000 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Details

Catalog

Manual

Manual tubes

Performance
Measuring Range
10 to 100 ppm 100 to 2000 ppm 2000 to 4000 ppm
Number of Pump Strokes
2 to 10 1 1/2
Correction Factor
1/2 to 1/10 1 2
Sampling Time 45 seconds per pump stroke
Detecting Limit 2 ppm (n=10)
Colour Change White → Brown
Reaction Principle H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
Coefficient of Variation 5% (for 100 to 2000 ppm)
Shelf Life 3 Years
Corrections for temperature & humidity Unnecessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Ammonia   No No
Carbon monoxide,
Carbon dioxide		   No No
sulphur dioxide 1/1 + No
Mercaptans   No No
Organic substance   No No
Nitrogen dioxide 1/4 No
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
1 ppm 5 ppm 4.0 to 44%

 

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