Indicator: 5~70ppm
Measuring Range:
+ 0.25 to 2.5 ppm, Number of Pump Strokes 2 to 10
+ 2.5 to 70 ppm, Number of Pump Strokes 1
+ 70 to 140 ppm, Number of Pump Strokes 1/2
Sampling Time: 1.5 minute per pump stroke
Colour Change: White → Yellow
Reaction Principle: 2CH3SH + PdSO4 → (CH3S)2Pd + H2SO4
Coefficient of Variation: 10% (for 2.5 to 20 ppm), 5% (for 20 to 70 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 0.25 to 2.5 ppm |
2.5 to 70 ppm |
70 to 140 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.1 ppm (n=10) |
| Colour Change |
White → Yellow |
| Reaction Principle |
2CH3SH + PdSO4 → (CH3S)2Pd + H2SO4 |
| Coefficient of Variation |
10% (for 2.5 to 20 ppm), 5% (for 20 to 70 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 |
No(two layers) |
Pale brown
(whole layer) |
| Carbon Monoxide |
2000 ppm |
No(two layers) |
Pale brown
( whole layer) |
| Other Mercaptans |
|
+ |
Yellow |
| Hydrogen sulphide |
500 ppm |
No |
No |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 0.5 ppm(2014) |
- |
3.9 to 21.8% |
