Indicator: 50~1000ppm
Measuring Range:
+ 2.5 to 25 ppm, Number of Pump Strokes 2 to 10
+ 25 to 1000 ppm, Number of Pump Strokes 1
+ 1000 to 2000 ppm, Number of Pump Strokes 1/2
Sampling Time: 1 minutes per pump stroke
Colour Change: Yellow → Blackish brown
Reaction Principle: CO + Na2Pd(SO3)2 → Pd + CO2 + SO2+Na2SO3
Coefficient of Variation: 0% ( 25 ~ 300 ppm), 5% ( 300 ~ 1000 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 2.5 to 25 ppm |
25 to 1000 ppm |
1000 to 2000 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
1 ppm (n=10) |
| Colour Change |
Yellow → Blackish brown |
| Reaction Principle |
CO + Na2Pd(SO3)2 → Pd + CO2 + SO2+Na2SO3 |
| Coefficient of Variation |
10% (for 25 to 300 ppm), 5% (for 300 to 1000 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 |
| Ethylene |
2000 ppm |
No |
Brown (whole layer) |
| Hydrogen |
5000 ppm |
+ |
Dark brown (whole layer)(1%) |
| sulphur dioxide |
1/10 time |
+ |
Dark brown |
| Nitrogen dioxide |
40 ppm |
+ |
Red (60 ppm) |
| Carbon disulphide |
1/50 time |
+ |
Dark brown |
| Halogens |
1/5 time |
+ |
Dark brown |
| Mercaptans |
1/5 time |
+ |
Dark brown |
| Hydrogen sulphide |
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% |
