Indicator: 5 ~ 40 ppm
Measuring Range: 0.5 ~ 40 ppm
Sampling Hours: 1 to 10 hours
Colour Change: White → Yellow
Reaction Principle: H2O2 + Ti(SO4)2 → Yellow product
Coefficient of Variation: 10% (for 5 to 40 ppm-hr)
Nr. of tests: 10
Catalog
Performance
| Measuring Range |
0.5 to 40 ppm |
| Sampling Hours |
1 to10 hours |
| Detecting Limit |
0.3 ppm (10 hours) |
| Colour Change |
White → Yellow |
| Reaction Principle |
H2O2 + Ti(SO4)2 → Yellow product |
| Coefficient of Variation |
10% (for 5 to 40 ppm-hr) |
| Shelf Life |
3 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 |
| Nitrogen dioxide |
|
No |
No |
| Chlorine,Ozone |
|
No |
No |
| Acetaldehyde |
≧ 20 ppm |
Unclear demarcation |
No |
| Formaldehyde |
≧ 10 ppm |
 |
No |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm |
- |
- |
