Indicator: 0.2~6%
Measuring Range: 0.02 ~12%
Sampling Hours: 0.5 to 10
Colour Change: Pale Red → Yellow
Reaction Principle: CO2 + 2KOH → K2CO3 + H2O
Coefficient of Variation: 10% (for 0.2 to 6.0 %-hr)
Nr. of tests: 10
Catalog
Performance
| Measuring Range |
0.02 to 12% |
| Sampling Hours |
0.5 to 10 hours |
| Colour Change |
Pale Red → Yellow |
| Reaction Principle |
CO2 + 2KOH → K2CO3 + H2O |
| Coefficient of Variation |
10% (for 0.2 to 6.0 %-hr) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Ammonia |
500 ppm |
No |
No ( ≦ 500ppm) |
| Hydrogen chloride |
300 ppm |
No |
No ( ≦ 300 ppm) |
| Chlorine |
10 ppm |
No |
No ( ≦ 5 ppm) |
| Hydrogen cyanide |
50 ppm |
No |
No ( ≦ 30 ppm) |
| sulphur dioxide |
15 ppm |
No |
No ( ≦ 15 ppm) |
| Nitrogen dioxide |
10 ppm |
No |
No ( ≦ 10 ppm) |
| Hydrogen sulphide |
50 ppm |
No |
No ( ≦ 30 ppm) |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 5000 ppm (2014) |
30000 ppm (2014) |
- |
