Indicator: 1 to 10 %
Measuring Range:
+ 0.25 to 0.5%, Number of Pump Strokes 2
+ 0.5 to 10 %, Number of Pump Strokes 1
+ 10 to 20 %, Number of Pump Strokes 1/2
Sampling Time: 3 minutes per pump stroke
Colour Change: Pale Blue → Blackish Brown
Reaction Principle: H2S + CuSO4 → CuS + H2SO4
Coefficient of Variation: 10% (for 0.5 to 3 %), 5% (for 3 to 10 %)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
manual tube
Performance
| Measuring Range |
| 0.25 to 0.5% |
0.5 to 10 % |
10 to 20 % |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
3 minutes per pump stroke |
| Detecting Limit |
0.1% (n=2) |
| Colour Change |
Pale Blue → Blackish Brown |
| Reaction Principle |
H2S + CuSO4 → CuS + H2SO4 |
| Coefficient of Variation |
10% (for 0.5 to 3 %), 5% (for 3 to 10 %) |
| 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 |
| Ammonia |
|
Two layers
(Dark brown & dark blue) |
Dark blue |
| sulphur dioxide |
2.5% |
 |
No |
| Mercaptans |
5 % |
+ |
No |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm (2014) |
5 ppm (2014) |
4.0 to 44% |
