Carbon monoxide |
NO.1LK |
| CO |  |
 |
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 | 0.5 ppm (n=3) | |||
| Colour Change | white → Pale brown / Pale green (dual layers) | |||
| Reaction Principle | 5CO + I2O5 + H2S2O7 → I2 | |||
| Coefficient of Variation | 10% (for 5 to 20 ppm), 5% (for 20 to 100 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 |
| Hydrogen |  10% |
 |
No |
| Ammonia | No | No | |
| Carbon dioxide | No | No | |
| Hydrogen sulphide | No | No | |
| Nitrogen oxides | No | No | |
| sulphur dioxide | No | No |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm | - | 12.5 to 74% |
