Gastec 1D Passive Dosl Tubes Carbon monoxide CO (1.04 ~ 2000 ppm)
ManufacturerGastec(View more products from this manufacturer)
Model1D
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Indicator: 50~1000ppm Mendicator: 50~1000ppmMendicator: 50~1000ppm
Measuring Range: 1.04 to 2000 ppm
Sampling Hours: 0.5 to 48 hours
Colour Change: Pale Yellow → Brown
Reaction Principle: CO + Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3
Coefficient of Variation: 10% (for 50 to 1000 ppm-hr)
Nr. of tests: 10
Performance
| Measuring Range | 1.04 to 2000 ppm |
| Sampling Hours | 0.5 to 48 hours |
| Detecting Limit | 2 ppm (10 hours) |
| Colour Change | Pale Yellow → Brown |
| Reaction Principle | CO + Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3 |
| Coefficient of Variation | 10% (for 50 to 1000 ppm-hr) |
| 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 |
| Nitrogen dioxide | ≧ 5 ppm |  |
No |
| Chlorine | No | No | |
| Hydrogen sulphide | + | Reddish brown |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 25 ppm | - | 12.5 to 74% |
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