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
Detail
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% |