Carbon dioxide |
NO.2HH |
Measuring Range |
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Number of Pump Strokes |
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Correction Factor |
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Sampling Time | 45 seconds | ||
Detecting Limit | 0.04% (n=1) | ||
Colour Change | Orange → Yellow | ||
Reaction Principle | CO2 + N2H4 → NH2NHCOOH | ||
Coefficient of Variation | 10% (for 5 to 10 %), 5% (for 10 to 40 %) | ||
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 |
Ammonia | 8% | No | No |
Carbon monoxide | No | No | |
Hydrogen chloride | 3% | No | White ( 4000 ppm) |
Chlorine | 1% | No | White ( 1000 ppm) |
Nitrogen dioxides | 1/5 | No | Pale yellow ( 50 ppm) |
Sulphur dioxide | 2% | No | Pale yellow ( 2400 ppm) |
Ethanol | 7% | No | Pale yellow ( 2 %) |
Acetic acid | 2% | No | Pale yellow ( 4500 ppm) |
Hydrogen sulphide | 1/15 | No | Pale yellow ( 1200 ppm) |
Ttimethylamine | 10% | No | |
Nitoric oxide | No | ||
Ethylene , Propane | No |
Calibration gas generation | High pressure gas cylinder method |
TLV-TWA | TLV-STEL | Explosive range |
5000 ppm | 30000 ppm | - |