品牌
生产厂家厂商性质
郑州市所在地
| Performance |
| Measuring Range | 0.1 to 30 ppm |
| Sampling Hours | 1 to 10 hours |
| Detecting Limit | 0.05 ppm （10hours） |
| Color Change | White→ Yellow |
| Reaction Principle | NO2 + o-Toluidine → Yellowproduct |
| Coefficient ofVariation | 10%（for 1 to 30 ppm-hr） |
| ShelfLife | 1 Year |
| Correctionsfor temperature & humidity | Temperature correction isnecessary |
| Store the tubes inthe refrigerator to keep at 10ºC （50ºF） orbelow. | |
| Possible coexisting substances and theirinterferences | （NOTE） |
| Substance | Concentration | Interference | Change color by itself |
| Bromine,Chlorine | - | Yellow | |
| Ammonia Carbon monoxide Nitric oxide sulphur dioxide Organic gases and vapour |
| No | No |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-S | Explosive range |
| 3 ppm | 5 ppm | - |
