Indicator: 0.5 to 20 ppm
Measuring Range:
+ 0.25 to 0.5 ppm, Number of Pump Strokes 7
+ 0.5 to 20 ppm, Number of Pump Strokes 4
+ 20 to 100 ppm, Number of Pump Strokes 1
Sampling Time: 45 second per pump stroke
Colour Change: Yellow → Brown
Reaction Principle: HF + Indicator → Chemical reaction compound
Coefficient of Variation: 10% (for 0.5 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 0.5 ppm |
0.5 to 20 ppm |
20 to 100 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
0.1 ppm (n=7) |
| Colour Change |
Yellow → Brown |
| Reaction Principle |
Hydrogen fluoride reacts with indicator to produce brownish pink colour.
HF + Indicator → Chemical reaction compound |
| Coefficient of Variation |
10% (for 0.5 to 5 ppm), 5% (for 5 to 20 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 |
| Hydrogen chloride, Nitric acid |
1/5 time |
+ |
Brown |
| Chlorine, Nitrogen dioxide |
1/10 time |
+ |
Brown |
Other substance measurable with this detector tube
| Substance |
Correction Factor |
pump stroke |
Temperature |
Absolute Humidity |
Colour Change |
| Fluorine |
2.5 |
1 |
20ºC (68ºF) |
9 mg/L |
Produces a brown stain |
| 1.0 |
1 |
20ºC (68ºF) |
3 mg/L |
Produces a brown ring stain |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 0.5ppm(2014) |
C2 ppm(2014) |
|
