Gastec 1LM 快速一氧化碳测量探测管CO(25~2000 ppm)

Indicator: 50 ~ 1000 ppm
Measuring Range: 
+ 25 to 50 ppm, Number of Pump Strokes 2
+ 50 to 1000 ppm, Number of Pump Strokes 1
+ 1000 to 2000 ppm, Number of Pump Strokes 1/2
Sampling Time:  45 seconds per pump stroke
Colour Change: White → Pale brown / Pale green (dual layers) 
Reaction Principle: 5CO + I2O5 + H2S2O7 → I2
Coefficient of Variation: 10% (for 50 to 200 ppm), 5% (for 200 to 1000 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Detail

Catalog

Manual

Performance
Measuring Range
25 to 50 ppm 50 to 1000 ppm 1000 to 2000 ppm
Number of Pump Strokes
2 1 1/2
Correction Factor
1/2 1 2
Sampling Time 45 seconds per pump stroke
Detecting Limit 5 ppm (n=2)
Colour Change White → Pale brown / Pale green (dual layers)
Reaction Principle 5CO + I2O5 + H2S2O7 → I2
Coefficient of Variation 10% (for 50 to 200 ppm), 5% (for 200 to 1000 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
Acetylene, Olephines, Propane, Hexane   + Pale brown
Butane   + Pale brown
Hydrogen   No No
Calibration gas generation High pressure gas cylinder method
TLV-TWA TLV-STEL Explosive range
25 ppm - 12.5 to 74%

 

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