Indicator: 0.2 ~5.0%
Measuring Range:
+ 0.1 ~ 0.2%, Number of Pump Strokes 2
+ 0.2 ~ 5.0%, Number of Pump Strokes 1
+ 5.0 ~10.0%, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: White → Blackish brown
Reaction Principle: 5CO + I2O5 + H2S2O7 → I2
Coefficient of Variation: 10% (for 0.2 to 1.0 %), 5% (for 1.0 to 5.0 %)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 0.1 to 0.2% |
0.2 to 5.0% |
5.0 to10.0% |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
0.02% (n=2) |
| Colour Change |
White → Blackish brown |
| Reaction Principle |
5CO + I2O5 + H2S2O7 → I2 |
| Coefficient of Variation |
10% (for 0.2 to 1.0 %), 5% (for 1.0 to 5.0 %) |
| 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 |
| Acetylene |
0.3% |
+ |
Blackish brown |
| Olefins |
2/3 time |
+ |
Brown |
| Butane |
1% |
+ |
Pale brown (whole layer) |
| Propane |
20% |
+ |
No |
| Hexane |
0.3% |
+ |
Pale brown (whole layer) |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm |
- |
12.5 to 74% |
