Gastec 136LL 快速甲基溴检测管CH3Br(0.1~3ppm)

Indicator: 0.1 to 1.2 ppm
Measuring Range: 
+ 0.1 to 1.2 ppm, Number of Pump Strokes 2
+ 1.2 to 3.0 ppm, Number of Pump Strokes 1
Sampling Time: 3 minute per pump stroke
Colour Change: White → Pale purple 
Reaction Principle: CH3Br + CrO3 + H2S2O7 → Br2
Coefficient of Variation: 10% (for 0.1 to 0.4 ppm), 5% (for 0.4 to 1.2 ppm
Nr. of tests: 5
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
0.1 to 1.2 ppm 1.2 to 3.0 ppm
Number of Pump Strokes
2 1
Correction Factor
1 2.5
Sampling Time 3 minutes per pump stroke
Detecting Limit 0.02 ppm (n=2)
Colour Change White → Pale purple
Reaction Principle CH3Br + CrO3 + H2S2O7 → Br2
Coefficient of Variation 10% (for 0.1 to 0.4 ppm), 5% (for 0.4 to 1.2 ppm)
Shelf Life 2 Years
Corrections for temperature & humidity Temperature correction is necessary
Store the tubes at cool and dark place.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Chlorine 5/2 + Pale purple(2ppm)
Trichloroethylene 1/1 + Pale purple(1ppm)
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
1 ppm - 10 to 15%
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