Tetrahydrothiophene Detection Tubes (10 to 200 ppm)
Gastec Detection Tube No. 76H measures Tetrahydrothiophene with a Range of 10 to 200 ppm.
- Measuring Range: 10 to 200 ppm
- Pump Stroke: 1 (100 ml)
- Correction Factor: 1
- Sampling Time: 1 minute per pump stroke
- Detecting Limit: 2 ppm (1 pump stroke)
- Changes from Pink to Pale Yellow
- Corrections for temperature & humidity: Temperature correction is necessary
- Reaction Principle: C4H8S + MnO4 → Reaction Product
- Relative Standard Deviation: 10% (for 10 to 60 ppm), 5% (for 80 to 200 ppm)
- 2 Year Shelf Life
- Store the tubes at cool & dark place.
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Hydrogen sulfide |
≦ 300 ppm |
No |
Pale pink (whole layer) |
| Ethyl mercaptan |
≦ 3 ppm |
No |
Pale pink (whole layer) |
| Ethylene |
≦ 5000 ppm |
No |
Pale pink (whole layer) |
| Propylene |
≦ 2000 ppm |
No |
Pale pink (whole layer) |
| Methanol |
≦ 2000 ppm |
No |
Pale pink (whole layer) |
Tetrahydrothiophene Detection Tubes (10 to 200 ppm)
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