1.2-Dichloroethylene Detection Tubes (5 to 250 ppm)
Gastec Detection Tube No. 139 measures 1,2-Dichloroethylene with a Range of 5 to 250 ppm.
- Measuring Range:
- 5 to 10 ppm
- 10 to 100 ppm
- 100 to 250 ppm
- Number of Pump Strokes: 2, 1, 1/2
- Correction Factor: 1/2, 1, 2.5
- Sampling Time: 45 seconds per pump stroke
- Detecting Limig 1 ppm (2 pump strokes)
- Changes from Yellow to Reddish Purple
- Corrections for temperature & humidity: Temperature correction is necessary
- Relative Standard Deviation: 10% (for 10 to 20 ppm), 5% (for 20 to 100 ppm)
- 2 year Shelf Life (in the refrigerator)
- Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.
- Reaction Principle:
- ClCH:CHCl + PbO2 + H2SO4 → HCl
- HCl + Base → Chloride
Possible coexisting substances and their intereferences:
| Substance |
Interference |
Changes color by itself to |
| Halogens |
+ |
Reddish purple |
| Hydrogen chloride |
+ |
Reddish purple |
| Tetrachloroethylene |
+ |
Reddish purple |
| Trichloroethylene |
+ |
Reddish purple |
| Nitric oxide |
No |
No |
| Nitrogen oxides |
No |
No |
1.2-Dichloroethylene Detection Tubes (5 to 250 ppm)
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