Carbon monoxide |
NO.1LM |
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Measuring Range |
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Number of Pump Strokes |
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Correction Factor |
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Sampling Time | 1.5 minutes per pump stroke | |||
Detecting Limit | 5 ppm (n=2) | |||
Colour Change | White → Pale brown | |||
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. |
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% |