Indicator: 0.1 to 1.2 ppm
Measuring Range:
+ 0.1 to 1.2 ppm, Number of Pump Strokes 2
+ 1.2 to 3.0 ppm, Number of Pump Strokes 1
Sampling Time: 3 minute per pump stroke
Colour Change: White → Pale purple
Reaction Principle: CH3Br + CrO3 + H2S2O7 → Br2
Coefficient of Variation: 10% (for 0.1 to 0.4 ppm), 5% (for 0.4 to 1.2 ppm
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 0.1 to 1.2 ppm |
1.2 to 3.0 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
3 minutes per pump stroke |
| Detecting Limit |
0.02 ppm (n=2) |
| Colour Change |
White → Pale purple |
| Reaction Principle |
CH3Br + CrO3 + H2S2O7 → Br2 |
| Coefficient of Variation |
10% (for 0.1 to 0.4 ppm), 5% (for 0.4 to 1.2 ppm) |
| Shelf Life |
2 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 |
| Chlorine |
 5/2 |
+ |
Pale purple(2ppm) |
| Trichloroethylene |
1/1 |
+ |
Pale purple(1ppm) |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm |
- |
10 to 15% |
