Indicator: 5 ~ 50 ppm
Measuring Range: 5 ~ 50 ppm, Number of Pump Strokes 2
Sampling Time: 3 minutes per pump stroke
Colour Change: Yellow → Blackish brown
Reaction Principle: CO + Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3
Coefficient of Variation: 15% (for 5 to 10 ppm), 10% (for 10 to 50 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
5 to 50 ppm |
| Number of Pump Strokes |
2 |
| Correction Factor |
1 |
| Sampling Time |
3 minutes per pump stroke |
| Detecting Limit |
1 ppm (n=2) |
| Colour Change |
Yellow → Blackish brown |
| Reaction Principle |
CO + Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3 |
| Coefficient of Variation |
15% (for 5 to 10 ppm), 10% (for 10 to 50 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 |
1/50 time |
+ |
Dark brown |
| sulphur dioxide |
1/10 time |
+ |
Dark brown |
| Nitrogen dioxide |
40 ppm |
+ |
Red |
| Hydrogen sulphidet |
1/5 time |
+ |
Dark brown |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm(2014) |
- |
12.5 to 74% |