Indicator: 50 to 1600 ppm
Measuring Range:
+ 20 to 50 ppm, Number of Pump Strokes 2
+ 50 to 1600 ppm, Number of Pump Strokes 1
+ 1600 to 4000 ppm, Number of Pump Strokes 1/2
Sampling Time: 1.5 minutes per pump stroke
Colour Change: Purple → Yellow
Reaction Principle: CS2 + I2O5 + H2S2O7 → SO2 + CO2, SO2 + BaCl2 + H2O → BaSO3 + 2HCl, HCl + Base → Chloride
Coefficient of Variation: 10% (for 50 to 400 ppm), 5% (for 400 to 1600 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 20 to 50 ppm |
50 to 1600 ppm |
1600 to 4000 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
10 ppm (n=2) |
| Colour Change |
Purple → Yellow |
| Reaction Principle |
CS2 + I2O5 + H2S2O7 → SO2 + CO2
SO2 + BaCl2 + H2O → BaSO3 + 2HCl
HCl + Base → Chloride |
|
| Coefficient of Variation |
10% (for 50 to 400 ppm), 5% (for 400 to 1600 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 |
| sulphur dioxide |
|
+ |
Yellow |
| Hydrogen sulphide |
|
+ |
Yellow |
| Lower class HCs |
1000 ppm |
+ |
Yellow |
| Carbonyl sulphide |
|
+ |
Yellow |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm(2014) |
- |
1.3 to 50% |
