Indicator: 1 to 20 ppm
Measuring Range:
+ 0.2 to 1 ppm, Number of Pump Strokes 2 to 5
+ 1 to 20 ppm, Number of Pump Strokes 1
+ 20 to 76 ppm, Number of Pump Strokes 1/2
Sampling Time: per pump stroke
Colour Change: Yellow → Pink
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
Performance
| Measuring Range |
| 0.2 to 1 ppm |
1 to 20 ppm |
20 to 76 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
0.05 ppm (n=5) |
| Colour Change |
Yellow → Pink |
| Reaction Principle |
Hydrogen chloride reacts with indicator to produce pink stain.
HCl + Indicator → Chemical reaction compound |
| Coefficient of Variation |
10% (for 1 to 5 ppm), 5% (for 5 to 20 ppm) |
| Shelf Life |
3 Years |
| Corrections for temperature & humidity |
Unnecessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Chlorine |
1/2 |
+ |
Pink |
| Nitric Acid |
1/10 |
+ |
Pink |
| sulphur dioxide |
10 times |
+ |
Pink |
| Nitrogen dioxide |
5 times |
+ |
Pink |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
C 2 ppm |
- |
