Performance
| Measuring Range |
1.3 to 200 ppm |
| Sampling Hours |
1 to 8 hours |
| Detecting Limit |
1.3 ppm (8 hours) |
| Colour Change |
Reddish purple → Pale brown |
| Reaction Principle |
CH2:CHCH:CH2 + MnO4 ¨ Pale
brown product |
| Coefficient of Variation |
10% (for 10 to 200 ppm¥hr) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Interference |
Change colour by itself to |
| Unsaturated hydrocarbons |
+ |
Pale brown |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
Measuring Range |
| Ethylene |
Factor: 1.2 |
1.5 to 240 ppm |
| Vinyl chloride |
Factor: 1.2 |
1.5 to 240 ppm |
| Isoprene |
Factor: 2.0 |
2.5 to 400 ppm |
| Trans-1,2-Dichloroethylene |
Factor: 3.0 |
3.8 to 600 ppm |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 2 ppm |
- |
2.0 to 12% |
