Indicator: 0.5 ~ 4.0%
Measuring Range:
+ 0.05 to 0.5%, Number of Pump Strokes 2 to 10
+ 0.5 to 4.0%, Number of Pump Strokes 1
+ 4.0 to 8.0%, Number of Pump Strokes 1/2
Sampling Time: per pump stroke
Colour Change:
Reaction Principle: SO2 + Cr6+→ Cr3+
Coefficient of Variation: 10% (for 0.5 to 1 %), 5% (for 1 to 4 %)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 0.05 to 0.5% |
0.5 to 4.0% |
4.0 to 8.0% |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
0.01% (n=10) |
| Colour Change |
Orange → Green |
| Reaction Principle |
SO2 + Cr6+→ Cr3+ |
| Coefficient of Variation |
10% (for 0.5 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 |
| Carbon monoxide |
|
No |
No |
| Carbon dioxide |
|
No |
No |
| Nitrogen dioxide |
|
No |
No |
| Hydrogen sulphide |
≧500 ppm |
+ |
No |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
0.25 ppm (2014) |
- |
