品牌
生产厂家厂商性质
郑州市所在地
| Performance |
| Measuring Range | 10 to 600 ppm |
| Sampling Hours | 1 to 5 hours |
| Detecting Limit | 1 ppm （5hours） |
| Color Change | Bluishpurple → White |
| Reaction Principle | SO2 + I2+H2O → 2HI + H2SO4 |
| Coefficient ofVariation | 10%（for 50 to 600 ppmr） |
| ShelfLife | 3 Year |
| Correctionsfor temperature & humidity | Temperature correction isnecessary |
| Store the tubes atcool and dark place. | |
| Possible coexisting substances and theirinterferences | （NOTE） |
| Substance | Concentration | Interference | Change color by itself |
| Nitrogendioxide | - | No | |
| Hydrogen sulphide |
| + | White |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-S | Explosive range |
| 2 ppm | 5 ppm | - |
