Indicator: 5 to 120 ppm
Measuring Range:
+ 0.5 to 5 ppm, Number of Pump Strokes 2 to 10
+ 5 to 120 ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: White → Yellow
Reaction Principle: 2C2H5SH + PdSO4 → (C2H5S)2Pd+ H2SO4
Coefficient of Variation: 10% (for 5 to 40 ppm), 5% (for 40 to 120 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 0.5 to 5 ppm |
5 to 120 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.2 ppm (n=10) |
| Colour Change |
White → Yellow |
| Reaction Principle |
2C2H5SH + PdSO4 → (C2H5S)2Pd+ H2SO4 |
| Coefficient of Variation |
10% (for 5 to 40 ppm), 5% (for 40 to 120 ppm) |
| Shelf Life |
3 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 |
| Acetylene, Ethylene |
 2000 ppm |
+ |
Pale brown (whole layer) |
| Carbon Monoxide |
2000 ppm |
+ |
Pale brown (whole layer) |
| Other Mercaptans |
|
+ |
Yellow |
| Hydrogen sulphide |
500 ppm |
+ |
No |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 0.5 ppm(2014) |
- |
2.8 to 18.2% |
