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简单介绍：
1,2-二氯乙烯气体检测管139，Measuring Range 5 to 10 ppm 10 to 100 ppm 100 to 250ppm Number of Pump Strokes 2 1 1/2 Correction Factor 1/2 1 2.5 Sampling Time 1 minute per pump，1,2-二氯乙烯检测管139 1,2-Dichloroethylene
详情介绍：
1,2-二氯乙烯气体检测管139 1,2-Dichloroethylene No.139
ClCH:CHCl
| Performance |
MeasuringRange | 5 to 10 ppm | 10 to 100 ppm | 100 to 250ppm |
Number of Pump Strokes | 2 | 1 | 1/2 |
Correction Factor | 1/2 | 1 | 2.5 |
SamplingTime | 1 minute per pumpstroke | ||
DetectingLimit | 1 ppm (n=2) | ||
ColorChange | Yellow → ReddishPurple | ||
ReactionPrinciple | ClCH:CHCl +PbO2 + H2SO4 → HCl | ||
| Coefficient ofVariation | 10% (for10 to 20 ppm), 5% (for 20 to 100 ppm) | ||
| ShelfLife | 2Years | ||
| Correctionsfor temperature & humidity | Temperature correction is necessary | ||
| Store the tubes inthe refrigerator to keep at 10oC (50oF) orbelow. | |||
| Possible coexisting substances and theirinterferences | (NOTE) |
Substance | Concentration | Interference | Change color byitself |
Nitrogen monoxide,Nitrogen dioxide | - | No effect | Nodiscoloration |
Hydrogen chloride,Halogens | - | Plus error | Produce reddishpurple stain |
Tetrachloroethylene | - | Plus error | Produces reddishpurple stain |
Trichloroethylene | - | Plus error | Produces reddishpurple stain |
| Othersubstance measurable with this detector tube |
| Calibration gasgeneration | Diffusion tubemethod | |
| TLV-TWA | TLV-STEL | Explosive range |
| 200ppm | - | - |