品牌
生产厂家厂商性质
郑州市所在地
| Performance |
| Measuring Range | 100 to 25000ppm |
| Sampling Hours | 1 to 10 hours |
| Detecting Limit | 0.05 ppm （10hours） |
| Color Change | Yellow→ Brown |
| Reaction Principle | C2H5OH +Cr6++H2SO4 →Cr3+ |
| Coefficient ofVariation | 15%（for 1000 to 3000 ppm-hr）, 10% （for 3000 to 25000ppm-hr） |
| ShelfLife | 3 Year |
| Correctionsfor temperature & humidity | Unnecessary |
| Store the tubes atcool and dark place. | |
| Possible coexisting substances and theirinterferences | （NOTE） |
| Substance | Concentration | Interference | Change color by itself |
| Methanol,Esters | No | No | |
| Isopropyl alcohol | + | Brown |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-S | Explosive range |
| 1000 ppm | - | 3.3to 19% |
