Indicator: 0.2~2.0ppm
Measuring Range:
+ 0.05 to 0.1 ppm, Number of Pump Strokes 2
+ (0.1) to 2.0 ppm, Number of Pump Strokes 1
+ 2.0 to 4.0 ppm, Number of Pump Strokes 1/2
Sampling Time: 1.5 minute per pump stroke
Colour Change: Yellow →Pink
Coefficient of Variation: 5% (for 0.1 to 2.0 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 0.05 to 0.1 ppm |
(0.1) to 2.0 ppm |
2.0 to 4.0 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
0.01 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 0.1 to 2.0 ppm) |
| Shelf Life |
2 Years |
| Corrections for temperature & humidity |
Unnecessary |
| Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below. |
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 |
0.05 ppm |
+ |
Pink at 0.05 ppm |
| Nitric Acid |
6.0 ppm |
+ |
Pink at 5.0 ppm |
| Sulphur Dioxide |
10times |
+(dual layer) |
Pale pink at 2.0 ppm |
| Nitrogen Dioxide |
5times |
|
Pink at 6.5 ppm |
| Hydrogen Fluoride |
12.0 ppm |
+ |
Pink at 11.0 ppm |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 1 ppm (2014) |
5 ppm (2014) |
4.0 to 44% |
