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简单介绍：
甲苯气体检测管122 Toluene，Measuring Range 5 to10 ppm 10 to 300 ppm 300 to 690 ppm Number of Pump Strokes 2 1 1/2 Correction Factor 1/2 1 2.3 Sampling Time 1.5 minutes per pump stroke Detecting Limit 1 ppm
详情介绍：
甲苯气体检测管122 Toluene
Toluene No.122
C6H5CH3
| Performance |
MeasuringRange | 5 to10 ppm | 10 to 300 ppm | 300 to 690 ppm |
Number of Pump Strokes | 2 | 1 | 1/2 |
Correction Factor | 1/2 | 1 | 2.3 |
SamplingTime | 1.5 minutes per pumpstroke | ||
DetectingLimit | 1 ppm (n=2) | ||
ColorChange | White → Brown | ||
ReactionPrinciple | C6H5CH3 + I2O5 + H2SO4 → I2 | ||
| Coefficient ofVariation | 10% (for10 to 100 ppm), 5% (for 200 to 300 ppm) | ||
| ShelfLife | 3Years | ||
| Correctionsfor temperature & humidity | Unnecessary | ||
| Store the tubes at cool and darkplace. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color byitself |
Carbon Monoxide | 1000ppm | 2 layers | Discolors palebrown |
Acetylene | 2000 ppm | 2 layers | Discolors palebrown |
Xylene | 1/5 time | Plus error | Discolorsbrown |
Hexane | 2000 ppm | 2 layers | Discolors palebrown |
Benzene | 1/5 time | Plus error | Discolors paleyellow |
| Othersubstance measurable with this detector tube |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 50ppm | - | 1.4to 6.7% |