Indicator: 5 to 100 ppm
Measuring Range:
+ 2.5 to 5 ppm, Number of Pump Strokes 2
+ 5 to 100 ppm, Number of Pump Strokes 1
+ 100 to 200 ppm, Number of Pump Strokes 1/2
Sampling Time: 30 seconds per pump stroke
Colour Change: Purple → Yellow
Reaction Principle: 3NH3 + H3PO4 → (NH4)3PO4
Coefficient of Variation: 10% (for 5 to 20 ppm), 5% (for 20 to 100 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Performance
| Measuring Range |
| 2.5 to 5 ppm |
5 to 100 ppm |
100 to 200 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
30 seconds per pump stroke |
| Detecting Limit |
0.5 ppm (n=2) |
| Colour Change |
Purple → Yellow |
| Reaction Principle |
3NH3 + H3PO4 → (NH4)3PO4 |
| Coefficient of Variation |
10% (for 5 to 20 ppm), 5% (for 20 to 100 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% |
