Indicator: 20 to 500 ppm
Measuring Range:
+ 10 to 20 ppm, Number of Pump Strokes 2
+ 20 to 500 ppm, Number of Pump Strokes 1
+ 500 to 1000 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: Yellow → Red
Coefficient of Variation: 10% (for 20 to 100 ppm), 5% (for 100 to 500 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 10 to 20 ppm |
20 to 500 ppm |
500 to 1000 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
2.5 ppm (n=2) |
| Colour Change |
Yellow → Red |
| Reaction Principle |
Hydrogen chloride reacts with indicator to produce red stain.
HCl + Indicator → Chemical reaction compound |
| Coefficient of Variation |
10% (for 20 to 100 ppm), 5% (for 100 to 500 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 |
| Hydrogen fluoride |
 600 ppm |
No |
Red( 600 ppm) |
| Nitric Acid |
1/10 time |
+ |
Red |
| Nitrogen dioxide |
1/2 time |
No |
Red(500 ppm) |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
C 2 ppm(2014) |
- |
