Indicator: 50 ~ 1000 ppm
Measuring Range:
+ 25 to 50 ppm, Number of Pump Strokes 2
+ 50 to 1000 ppm, Number of Pump Strokes 1
+ 1000 to 2000 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: White → Pale brown / Pale green (dual layers)
Reaction Principle: 5CO + I2O5 + H2S2O7 → I2
Coefficient of Variation: 10% (for 50 to 200 ppm), 5% (for 200 to 1000 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 25 to 50 ppm |
50 to 1000 ppm |
1000 to 2000 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
5 ppm (n=2) |
| Colour Change |
White → Pale brown / Pale green (dual layers) |
| Reaction Principle |
5CO + I2O5 + H2S2O7 → I2 |
| Coefficient of Variation |
10% (for 50 to 200 ppm), 5% (for 200 to 1000 ppm) |
| 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, Olephines, Propane, Hexane |
|
+ |
Pale brown |
| Butane |
|
+ |
Pale brown |
| Hydrogen |
|
No |
No |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm |
- |
12.5 to 74% |
