Indicator: 1 to 10 ppm
Measuring Range: 1 to 10 ppm, Number of Pump Strokes 4
Sampling Time: 1 minute per pump stroke
Colour Change: Pink → Pale Yellow
Reaction Principle: C4H8S + MnO4 (Pink) → Pale Yellow Product
Coefficient of Variation: 10% (for 1 to 3 ppm), 5% (for 3 to 10 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
1 to 10 ppm |
| Number of Pump Strokes |
4 |
| Correction Factor |
1 |
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.25 ppm (n=4) |
| Colour Change |
Pink → Pale Yellow |
| Reaction Principle |
C4H8S + MnO4 (Pink) → Pale Yellow Product |
| Coefficient of Variation |
10% (for 1 to 3 ppm), 5% (for 3 to 10 ppm) |
| 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 |
Concentration |
Interference |
Change colour by itself to |
| Ethyl mercaptan |
 1 ppm |
No |
Pale pink (whole layer) |
| Ethylene |
1000 ppm |
No |
Pale pink (whole layer) |
| Propylene |
500 ppm |
No |
Pale pink (whole layer) |
| Methanol |
300 ppm |
No |
Pale pink (whole layer) |
| Hydrogen sulphide |
30 ppm |
No |
Pale pink (whole layer) |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
- |
- |
