Indicator: 0.2 ~ 5.0 ppm
Measuring Range:
+ 0.05 ~ 0.1 ppm, Number of Pump Strokes 8
+ 0.1 to 0.2 ppm, Number of Pump Strokes 4
+ 0.2 ~ 5.0 ppm, Number of Pump Strokes 2
+ 5.0 ~10.0 ppm, Number of Pump Strokes 1
Sampling Time: 1 minute per pump stroke
Colour Change: Yellowish green → Yellow
Reaction Principle: SO2 + BaCl2 +H2O → BaSO3 + 2HCl, HCl+Base → Chloride
Coefficient of Variation: 10% (0.2 ~ 1 ppm), 5% (1 ~ 5 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
0.05 to
0.1 ppm |
0.1 to
0.2 ppm |
0.2 to
5.0 ppm |
5.0 to
10.0 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.01 ppm (n=8) |
| Colour Change |
Yellowish green → Yellow |
| Reaction Principle |
SO2 + BaCl2 +H2O → BaSO3 + 2HCl
HCl+Base → Chloride |
| Coefficient of Variation |
10% (for 0.2 to 1 ppm), 5% (for 1 to 5 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 |
Carbon monoxide,
Nitric oxide |
|
No |
No |
| Carbon dioxide |
100% |
+ |
Yellow |
| Nitrogen dioxide |
≧ 1 ppm |
Unclear demarcation |
Yellow |
| Hydrogen sulphide |
|
No |
No |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
0.25 ppm (2014) |
- |
