| RESH |
 |
Performance
| Measuring Range |
| 0.1 to 0.2 ppm |
0.2 to 0.5 ppm |
0.5 to 4 ppm |
4 to 8 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.05 ppm (n=4) |
| Colour Change |
Yellow → Red |
| Reaction Principle |
R SH + HgCl2 → RSHgCl + HCl
HCl + Base ¨ Chloride |
| Coefficient of Variation |
10% (for 0.5 to 1 ppm), 5% (for 1 to 4 ppm) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Unnecessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Acid gases |
|
+ |
Red |
| Hydrogen sulphide |
 200 ppm |
No |
No |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
| Butyl mercaptan |
1.6 |
1/2,1,2 or 4 |
0.16 to 12.8 ppm |
| tert-Butyl mercaptan |
1.0 |
0.1 to 8 ppm |
| Ethyl mercaptan |
1.0 |
0.1 to 8 ppm |
| Methyl mercaptan |
1.0 |
0.1 to 8 ppm |
| Propyl mercaptan |
1.2 |
0.12 to 9.6 ppm |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
- |
- |
