Indicator: 5 to 100 ppm
Measuring Range:
+ 5 to 100 ppm, Number of Pump Strokes 3
+ 100 to 300 ppm, Number of Pump Strokes 1
+ 300 to 600 ppm, Number of Pump Strokes 1/2
Sampling Time: 2 minutes per pump stroke
Colour Change: white → Pale brown / Pale green (dual layers)
Reaction Principle: 5CO + I2O5 + H2S2O7 → I2
Coefficient of Variation: 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 5 to 100 ppm |
100 to 300 ppm |
300 to 600 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.5 ppm (n=3) |
| Colour Change |
white → Pale brown / Pale green (dual layers) |
| Reaction Principle |
5CO + I2O5 + H2S2O7 → I2 |
| Coefficient of Variation |
10% (for 5 to 20 ppm), 5% (for 20 to 100 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 |
| Hydrogen |
 10% |
 |
No |
| Ammonia |
|
No |
No |
| Carbon dioxide |
|
No |
No |
| Hydrogen sulphide |
|
No |
No |
| Nitrogen oxides |
|
No |
No |
| sulphur dioxide |
|
No |
No |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm |
- |
12.5 to 74% |
