Indicator: 1 to 6 ppm
Measuring Range:
+ 0.5 to 1 ppm, Number of Pump Strokes 2
+ 1 to 6 ppm, Number of Pump Strokes 1
+ 6 to 12 ppm, Number of Pump Strokes 1/2
Sampling Time: 1 minutes per pump stroke
Colour Change: Yellow → Pink
Coefficient of Variation: 5% (for 1 to 6 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 0.5 to 1 ppm |
1 to 6 ppm |
6 to 12 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1 minute per pump stroke |
| Detecting Limit |
0.07 ppm (n=2) |
| Colour Change |
Yellow → Pink |
| Reaction Principle |
Hydrogen Sulphide reacts with the reagent to form intermediate material which stains indicator pink
|
| Coefficient of Variation |
5% (for 1 to 6 ppm) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Unnecessary |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
| Ammonia |
 2.3 ppm |
 |
No discolouration |
| Ethyl Mercaptan |
0.5 ppm |
+ |
Pink at 0.4 ppm |
| Hydrogen Chloride |
4.5 ppm |
+ |
Pink at 4.0 ppm |
| Hydrogen Cyanide |
0.1 ppm |
+ |
Pink at 0.1 ppm |
| Nitric Acid |
6.0 ppm |
+ |
Pink at 5.0 ppm |
| Sulphur Dioxide |
1.0 ppm |
+ |
Pale pink at 0.7 ppm |
| Nitrogen Dioxide |
3.5 ppm |
|
Pink at 8.0 ppm |
| Hydrogen Fluoride |
13.0 ppm |
+ |
Pink at 10.0 ppm |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm (2014) |
5 ppm (2014) |
4.0 to 44% |
