Indicator: 5 to 50 ppm
Measuring Range:
+ 0.63 to 1.25 ppm, Number of Pump Strokes 4
+ 1.25 to 2.5 ppm, Number of Pump Strokes 2
+ 2.5 to 50 ppm, Number of Pump Strokes 1
+ 50 to 100 ppm, Number of Pump Strokes 1/2
Sampling Time: 3 minutes per pump stroke
Colour Change: Blue → Yellow
Reaction Principle:
+ CS2 + CrO3 + H2S2O7 → SO2 + CO2;
+ SO2 + BaCl2 + H2O → BaSO3 + 2HCl;
+ HCl + Base → Chlorides
Coefficient of Variation: 10% (for 2.5 to 10 ppm), 5% (for 10 to 50 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 0.63 to 1.25 ppm |
1.25 to 2.5 ppm |
2.5 to 50 ppm |
50 to 100 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
3 minutes per pump stroke |
| Detecting Limit |
0.3 ppm (n=4) |
| Colour Change |
Blue → Yellow |
| Reaction Principle |
CS2 + CrO3 + H2S2O7 → SO2 + CO2
SO2 + BaCl2 + H2O → BaSO3 + 2HCl
HCl + Base → Chlorides |
| Coefficient of Variation |
10% (for 2.5 to 10 ppm), 5% (for 10 to 50 ppm) |
| 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 |
| Ammonia |
|
No |
No |
| Hydrogen cyanide |
200 ppm |
No |
No |
| sulphur dioxide |
1/ 5 time |
+ |
Yellow |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm (2014) |
- |
1.3 to 50% |
