Gastec 137 快速氯仿检测管 CHCl3(4~400ppm)

Indicator: 10 to 100 ppm
Measuring Range: 
+ 4 to 10 ppm, Number of Pump Strokes 7
+ 10 to 100 ppm, Number of Pump Strokes 5
+ 100 to 400 ppm, Number of Pump Strokes 3
Sampling Time: 1.5 minute per pump stroke
Colour Change: White → Orange
Reaction Principle: CHCl3 + I2O5 + H2S2O7 → Cl2, Cl2 + o-Tolidine → Orange products
Coefficient of Variation: 15% (for 10 to 20 ppm), 10% (for 20 to 100 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
4 to 10 ppm 10 to 100 ppm 100 to 400 ppm
Number of Pump Strokes
7 5 3
Correction Factor
0.4 1 4
Sampling Time 1.5 minutes per pump stroke
Detecting Limit 1 ppm (n=7)
Colour Change White → Orange
Reaction Principle CHCl3 + I2O5 + H2S2O7 → Cl2
Cl2 + o-Tolidine → Orange products
Coefficient of Variation 15% (for 10 to 20 ppm), 10% (for 20 to 100 ppm)
Shelf Life 3 Years
Corrections for temperature & humidity Humidity 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
Cl2, Br2, I2 1/20 time + Orange
Unsaturated halogenated HCs 1/20 time + Orange
Saturated halogenated HCs 1/10 time + Orange
Calibration gas generation Diffusion tube method
TLV-TWA TLV-STEL Explosive range
10 ppm - -
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