Indicator: 10~200ppm
Measuring Range: 0.4 ~ 400 ppm
Sampling Hours: 0.5 to 24
Colour Change: Pale Yellow → Brown
Reaction Principle: CO + Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3
Coefficient of Variation: 10% (for 10 to 200 ppm-hr)
Nr. of tests: 10
Catalog
Performance
| Measuring Range |
0.4 to 400 ppm |
| Sampling Hours |
0.5 to 24 hours |
| Detecting Limit |
0.2 ppm (24 hours) |
| Colour Change |
Pale Yellow → Brown |
| Reaction Principle |
CO + Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3 |
| Coefficient of Variation |
10% (for 10 to 200 ppm-hr) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Unnecessary |
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Nitrogen monoxide |
≦ 1/10
|
No |
No |
| Sulphur dioxide |
≦ 1/1 |
No |
No |
| Nitrogen dioxide |
≦ 1/20 |
No |
Brown |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm |
- |
12.5 to 74% |