Indicator: 50 to 500 ppm
Measuring Range:
+ 20 to 50 ppm, Number of Pump Strokes 2
+ 50 to 500 ppm, Number of Pump Strokes 1
Sampling Time: 3 minute per pump stroke
Colour Change: White → Pale Pink
Reaction Principle: CH2:Cl2 + CrO3 + H2S2O7 → Cl2, Cl2+ 3,3,5,5-Tetramethylbenzidine → Holoquinone
Coefficient of Variation: 15% (for 50 to 100 ppm), 10% (for 100 to 500 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
Details
Catalog
Manual
Performance
Measuring Range |
20 to 50 ppm |
50 to 500 ppm |
|
Number of Pump Strokes |
|
Correction Factor |
|
Sampling Time |
3 minutes per pump stroke |
Detecting Limit |
10 ppm (n=2) |
Colour Change |
White → Pale Pink |
Reaction Principle |
CH2:Cl2 + CrO3 + H2S2O7 → Cl2 Cl2+ 3,3,5,5-Tetramethylbenzidine → Holoquinone |
Coefficient of Variation |
15% (for 50 to 100 ppm), 10% (for 100 to 500 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 |
Cl2, Br2, I2 |
|
+ |
Pale pink |
Unsaturated halogenated HCs |
|
+ |
Pale pink |
Saturated halogenated HCs |
|
+ |
Pale pink |
Other substance measurable with this detector tube
Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
Ethyl Chloride |
0.3 |
1 |
15 to 150 ppm |
Calibration gas generation |
Diffusion tube method |
TLV-TWA |
TLV-STEL |
Explosive range |
50 ppm |
- |
15.5 to 66.9% |