Indicator: 2.5 to 60 ppm
Measuring Range:
+ 0.5 to 1.25 ppm, Number of Pump Strokes 5, 45 seconds per pump stroke
+ 1.25 to 2.5 ppm, Number of Pump Strokes 2, 45 seconds per pump stroke
+ 2.5 to 60 ppm, Number of Pump Strokes 1, 45 seconds per pump stroke
+ 60 to150 ppm, Number of Pump Strokes 1/2, 30 seconds
Colour Change: Yellow →Pink
Coefficient of Variation: 10% (for 2.5 to 20 ppm), 5% (for 20 to 60 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Details
Catalog
Manual
Performance
Measuring Range |
0.5 to 1.25 ppm |
1.25 to 2.5 ppm |
2.5 to 60 ppm |
60 to150 ppm |
|
Number of Pump Strokes |
|
Correction Factor |
|
Sampling Time |
45 seconds per pump stroke |
30 seconds |
|
Detecting Limit |
0.1 ppm (n=5) |
Colour Change |
Yellow →Pink |
Reaction Principle |
Hydrogen cyanide reacts with the reagent to form intermediate material which stains indicator pink. |
Coefficient of Variation |
10% (for 2.5 to 20 ppm), 5% (for 20 to 60 ppm) |
Shelf Life |
2 Years |
Corrections for temperature & humidity |
Temperature 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 |
Ammonia |
2.5 ppm |
 |
No discolouration |
Hydrogen chloride |
5.0 ppm |
+ |
Pink at 5.0 ppm |
Nitric acid |
10.0 ppm |
+ |
Pink at 10.0 ppm |
Sulphur dioxide |
1.0 ppm |
+ |
Pink at 0.8 ppm |
Nitrogen dioxide |
10.0 ppm |
+ |
Pink at 8.0 ppm |
Hydrogen fluoride |
25.0 ppm |
+ |
Pink at 21.0 ppm |
Hydrogen sulphide |
0.5 ppm |
+ |
Pink at 0.5 ppm |
Other substance measurable with this detector tube
Substance |
Correction Factor |
No. of pump strokes |
Measuring Range |
Acetone cyanohydrine |
1.0 |
1 |
2.5 to 60 ppm |
Boron trichloride |
0.9 |
1 |
2.25 to 54 ppm |
Calibration gas generation |
Permeation tube method |
TLV-TWA |
TLV-STEL |
Explosive range |
- |
C 4.7 ppm (2014) |
5.6 to 40% |