Indicator: 2 to 20 %
Measuring Range:
+ 1 to 2 %, Number of Pump Strokes 2
+ 2 to 20 %, Number of Pump Strokes 1
+ 20 to 40 %, Number of Pump Strokes 1/2
Sampling Time: per pump stroke
Colour Change: Pale Blue → Blackish Brown
Reaction Principle: H2S + CuSO4 → CuS + H2SO4
Coefficient of Variation: 10% (for 2 to 6 %), 5% (for 6 to 20 %)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 1 to 2 % |
2 to 20 % |
20 to 40 % |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.2% (n=2) |
| Colour Change |
Pale Blue → Blackish Brown |
| Reaction Principle |
H2S + CuSO4 → CuS + H2SO4 |
| Coefficient of Variation |
10% (for 2 to 6 %), 5% (for 6 to 20 %) |
| Shelf Life |
3 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 |
| sulphur dioxide |
5% |
 |
No |
| Mercaptans |
10% |
+ |
No |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm |
5 ppm |
4.0 to 44% |
