Indicator: 2 to 30 ppm
Measuring Range:
+ 0.5 to1 ppm, Number of Pump Strokes 2
+ 1 to 30 ppm, Number of Pump Strokes 1
+ 30 to 78 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: Pink → Yellow
Reaction Principle: 2NH3 + H2SO4 → (NH4)2SO4
Coefficient of Variation: 10% ( 1 ~ 10 ppm), 5% (10 ~ 30 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
| 0.5 to1 ppm |
1 to 30 ppm |
30 to 78 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
45 seconds per pump stroke |
| Detecting Limit |
0.2 ppm (n=2) |
| Colour Change |
Pink → Yellow |
| Reaction Principle |
2NH3 + H2SO4 → (NH4)2SO4 |
| Coefficient of Variation |
10% (for 1 to 10 ppm), 5% (for 10 to 30 ppm) |
| Shelf Life |
3 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 |
| Carbon dioxide |
1% |
 |
No |
| Hydrazine |
|
+ |
Yellow |
| Amines |
1/15 |
+ |
Yellow ( 5 ppm) |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
| 25 ppm(2014) |
35 ppm(2014) |
15 to 28% |
