Indicator: 1 to 20 ppm
Measuring Range:
+ 0.25 to 1 ppm, Number of Pump Strokes 4
+ 1 to 20 ppm, Number of Pump Strokes 2
+ 20 to 70 ppm, Number of Pump Strokes 1
Sampling Time: 1.5 minute per pump stroke
Colour Change: Yellow → Purple
Reaction Principle: CH2:CHCl + PbO2 + H2SO4 → HCl, HCl + Base → Purple
Coefficient of Variation: 10% (for 1 to 5 ppm), 5% (for 5 to 20 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 0.25 to 1 ppm |
1 to 20 ppm |
20 to 70 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.05 ppm (n=4) |
| Colour Change |
Yellow → Purple |
| Reaction Principle |
CH2:CHCl + PbO2 + H2SO4 → HCl
HCl + Base → Purple |
| Coefficient of Variation |
10% (for 1 to 5 ppm), 5% (for 5 to 20 ppm) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Temperature correction is necessary |
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Chlorine, Hydrogen chloride |
≧ 1/10 |
+ |
Purple |
| Alcohols, Esters, Ketones |
|
No |
No |
| 1,2-Dichloroethylene |
≧ 1/10 |
+ |
Purple |
Trichloroethylene,
Tetrachloroethylene |
≧ 1/10 |
+ |
Purple |
| Aromatic hydrocarbons |
|
No |
No |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm (2014) |
- |
3.6 to 23% |
