Indicator: 10 to 100 ppm
Measuring Range:
+ 4 to 10 ppm, Number of Pump Strokes 7
+ 10 to 100 ppm, Number of Pump Strokes 5
+ 100 to 400 ppm, Number of Pump Strokes 3
Sampling Time: 1.5 minute per pump stroke
Colour Change: White → Orange
Reaction Principle: CHCl3 + I2O5 + H2S2O7 → Cl2, Cl2 + o-Tolidine → Orange products
Coefficient of Variation: 15% (for 10 to 20 ppm), 10% (for 20 to 100 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 4 to 10 ppm |
10 to 100 ppm |
100 to 400 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
1 ppm (n=7) |
| Colour Change |
White → Orange |
| Reaction Principle |
CHCl3 + I2O5 + H2S2O7 → Cl2
Cl2 + o-Tolidine → Orange products |
| Coefficient of Variation |
15% (for 10 to 20 ppm), 10% (for 20 to 100 ppm) |
| Shelf Life |
3 Years |
| Corrections for temperature & humidity |
Humidity 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 |
| Cl2, Br2, I2 |
1/20 time |
+ |
Orange |
| Unsaturated halogenated HCs |
1/20 time |
+ |
Orange |
| Saturated halogenated HCs |
1/10 time |
+ |
Orange |
| Calibration gas generation |
Diffusion tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 10 ppm |
- |
- |
