Carbon monoxiide |
NO.1LC |
| CO |  |
 |
Performance
| Measuring Range | 1 to 30 ppm |
| Number of Pump Strokes | 1 |
| Correction Factor | 1 |
| Sampling Time | 4 minutes per pump stroke |
| Detecting Limit | 0.5 ppm (n=1) |
| Colour Change | White → Pale Pink |
| Reaction Principle | CO + Paradium Salt (White) → Pale pink product |
| Coefficient of Variation | 10% (for 1 to 10 ppm), 5% (for 10 to 30 ppm) |
| Shelf Life | 2 Years |
| Corrections for temperature & humidity | Temperature correction is necessary |
| 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 | |
| sulphur dioxide | 1/20 time |  |
No |
| Nitrogen dioxide | 1/20 time | + | No |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm | - | 12.5 to 74% |
