Water vapour |
NO.6LLP |
| H2O |  |
 |
Performance
| Measuring Range | 2 to 10 LB/MMCF |
| Number of Pump Strokes | 2 |
| Correction Factor | 1 |
| Sampling Time | 3 minutes per pump stroke |
| Detecting Limit | 2 LB/MMCF (n=2) |
| Colour Change | Yellow → Green |
| Reaction Principle | H2O + Mg(ClO4)2 → Mg(ClO4)2  H2O |
| Coefficient of Variation | 10% (for 2 to 4 LB/MMCF), 5% (for 4 to 10 LB/MMCF) |
| Shelf Life | 3 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 |
| Sulphur dioxide | 15ppm | No | No |
| Nitrogen dioxide,Hydrogen sulphide | 30ppm | No | No |
| Hydrogen cyanide | 40ppm | No | No |
| Methyl ethyl ketone | 70ppm | No | No |
| Ethyl acetate | 100ppm | No | No |
| Acrylonitrile | 40ppm | No | No |
| Acetaldehyde | 50 ppm | No | No |
| Methanol | 50 ppm | + | Green |
| Triethylene glycol | No | No |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| - | - | - |
