Gastec 171 气体检测管乙炔C2H2(0.05~4%)

Indicator: 0.2 to 2.0%
Measuring Range: 
+ 0.05 to 0.1%, Number of Pump Strokes 2
+ 0.1 to 2.0%, Number of Pump Strokes 1
+ 2.0 to 4.0%, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: White → Brown
Reaction Principle: HCCH + I2O5→ H2S2O7 + I2
Coefficient of Variation: 15% (for 0.1 to 0.5 %), 10% (for 0.5 to 2 %)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
0.05 to 0.1% 0.1 to 2.0% 2.0 to 4.0%
Number of Pump Strokes
2 1 1/2
Correction Factor
1/2 1 2
Sampling Time 45 seconds per pump stroke
Detecting Limit 0.02 % (n=2)
Colour Change White → Brown
Reaction Principle HCCH + I2O5→ H2S2O7 + I2
Coefficient of Variation 15% (for 0.1 to 0.5 %), 10% (for 0.5 to 2 %)
Shelf Life 3 Years
Corrections for temperature & humidity Temperature correction is necessary
Store the tubes in the cool and dark place.
Possible coexisting substances and their interferences (NOTE)
Substance Concentration Interference Change colour by itself to
Carbon monoxide 0.1% + Brown(0.1%)
Ethylene 0.5% + Brown(0.5%)
More than C3 HCs   + Brown
Other substance measurable with this detector tube
Substance Correction Factor No. of pump strokes Measuring Range
Benzene 0.3 4 0.03 to 0.6%
Ethylene 1.0 1 0.1 to 2.0%
1,1,1-Trichloroethane 0.6 1 0.06 to 1.2%
Calibration gas generation High pressure gas cylinder method
TLV-TWA TLV-STEL Explosive range
- - 2.5 to 81%
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