Carbon dioxide |
NO.2LC |
| CO2 |  |
 |
Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 2 minutes per pump stroke | ||
| Detecting Limit | 20 ppm (n=1) | ||
| Colour Change | Pale Red → Yellow | ||
| Reaction Principle | CO2+ 2KOH → K2CO3+ H2O | ||
| Coefficient of Variation | 10% (for 100 to 600 ppm), 5% (for 700 to 2000 ppm) | ||
| Shelf Life | 2 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 | 1000 ppm | No | No |
| Hydrogen chloride | 500 ppm | No | No |
| Chlorine | 20 ppm | No | No |
| HCN, H2S | 100 ppm | No | No |
| sulphur dioxide | 25 ppm | No | No |
| Nitorgen dioxide | 20 ppm | No | No |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 5000 ppm | 30000 ppm | - |
