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
Details
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 |
- |
- |