Indicator: 0.2 to 4.0%
Measuring Range:
+ 0.02 to 0.2%, Number of Pump Strokes 2 to 10
+ 0.2 to 4.0%, Number of Pump Strokes 1
+ 4.0 to 8.0%, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: Brown → Pale Yellow
Reaction Principle: H2S + I2 → 2HI + S, SO2 + I2 + H2O → 2HI + H2SO4
Coefficient of Variation: 10% (for 0.2 to 1 %), 5% (for 1 to 4 %)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 0.02 to 0.2% |
0.2 to 4.0% |
4.0 to 8.0% |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
0.002% (n=10) |
| Colour Change |
Brown → Pale Yellow |
| Reaction Principle |
H2S + I2 → 2HI + S
SO2 + I2 + H2O → 2HI + H2SO4 |
| Coefficient of Variation |
10% (for 0.2 to 1 %), 5% (for 1 to 4 %) |
| 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 |
| Other Sulphur compounds |
|
+ |
Pale yellow |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
SO2:--(2014)
H2S:1 ppm (2014) |
SO2:0.25 ppm (2014)
H2S:5 ppm (2014) |
H2S:4.0 to 44 % |
