Gastec 4M 快速硫化氢测量探测管 H2S(12.5-500 ppm)

Indicator: 25 to 250 ppm
Measuring Range: 
+ 12.5 to 25 ppm, Number of Pump Strokes 2
+ 25 to 250 ppm, Number of Pump Strokes 1
+ 250 to 500 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 25 to 250 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Manual tubes

Performance
Measuring Range
12.5 to 25 ppm 25 to 250 ppm 250 to 500 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
1/2 1 2
Sampling Time 45 seconds per pump stroke
Detecting Limit 2.5 ppm (n=2)
Colour Change White → Brown
Reaction Principle H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
Coefficient of Variation 5% (for 25 to 250 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
Nitrogen dioxide 1/4 No
sulphur dioxide 1/1 + No
Mercaptans   No No
Calibration gas generation Permeation tube method
TLV-TWA TLV-STEL Explosive range
1 ppm(2014) 5 ppm(2014) 4.0 to 44%
  • 质量承诺
  • 正品保修
  • 送货到家
  • 交易简单化