Indicator: 50 to 800 ppm
Measuring Range:
+ 17 to 50 ppm, Number of Pump Strokes 2
+ 50 to 800 ppm, Number of Pump Strokes 1
+ 800 to 2400 ppm, Number of Pump Strokes 1/2
Sampling Time: 1 minutes per pump stroke
Colour Change: Yellow → Red
Reaction Principle: 2HCN + HgCl2 → Hg(CN)2 + 2HCl, HCl + Base → Chloride
Coefficient of Variation: 10% (for 50 to 200 ppm), 5% (for 200 to 800 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 17 to 50 ppm |
50 to 800 ppm |
800 to 2400 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
1 ppm (n=2) |
| Colour Change |
Yellow → Red |
| Reaction Principle |
2HCN + HgCl2 → Hg(CN)2 + 2HCl
HCl + Base → Chloride |
| Coefficient of Variation |
10% (for 50 to 200 ppm), 5% (for 200 to 800 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 sulphide |
500 ppm |
+ |
Red |
| sulphur dioxide |
500 ppm |
+ |
Red |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| - |
C 4.7 ppm |
5.6 to 40% |
