Carbon dioxide |
NO.2H |
| CO2 |  |
 |
Performance
| Measuring Range |
|
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| Number of Pump Strokes |
|
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| Correction Factor |
|
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| Sampling Time | 1 minute per pump stroke | |||
| Detecting Limit | 0.1% (n=2) | |||
| Colour Change | White → Purple | |||
| Reaction Principle | CO2 + N2H4 → NH2 NHCOOH |
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| Coefficient of Variation | 10% (for 1 to 3 %), 5% (for 3 to 10 %) | |||
| 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 |
| Ammonia | No | No | |
| Carbon Monoxide | No | No | |
| Chlorine | No | No | |
| Hydrogen sulphide | No | No | |
| Hydrogen chloride | No | No | |
| Nitrogen oxides | No | No | |
| sulphur dioxide | No | No | |
| Amines | No | No | |
| Organic solvents | No | No |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 5000 ppm | 30000 ppm | - |
