Gastec 32D Passive Dosl Tubes Hydrogen peroxide H2O2 (0.5 ~ 40 ppm)
ManufacturerGastec(View more products from this manufacturer)
Model32D
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Indicator: 5 ~ 40 ppm
Measuring Range: 0.5 ~ 40 ppm
Sampling Hours: 1 to 10 hours
Colour Change: White → Yellow
Reaction Principle: H2O2 + Ti(SO4)2 → Yellow product
Coefficient of Variation: 10% (for 5 to 40 ppm-hr)
Nr. of tests: 10
Performance
| Measuring Range | 0.5 to 40 ppm |
| Sampling Hours | 1 to10 hours |
| Detecting Limit | 0.3 ppm (10 hours) |
| Colour Change | White → Yellow |
| Reaction Principle | H2O2 + Ti(SO4)2 → Yellow product |
| Coefficient of Variation | 10% (for 5 to 40 ppm-hr) |
| 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 |
| Nitrogen dioxide | No | No | |
| Chlorine,Ozone | No | No | |
| Acetaldehyde | ≧ 20 ppm | Unclear demarcation | No |
| Formaldehyde | ≧ 10 ppm |  |
No |
| Calibration gas generation | Diffusion tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 1 ppm | - | - |
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