Indicator: 0.2 ~ 5.0 ppm
Measuring Range:
+ 0.04~0.08ppm, Number of Pump Strokes 8
+ 0.08ppm~0.2ppm, Number of Pump Strokes 4
+ 0.2~8.0ppm, Number of Pump Strokes 2
+ 5.0~16.5ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: White → Yellowish orange
Reaction Principle: NO + Cr6+ + H2SO4 →NO2, NO2 + o-Tolidine → Yellowish orange product
Coefficient of Variation: 10% (for 0.2 to 1 ppm), 5% (for 1 to 5 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
0.04 to
0.08 ppm |
0.08 to
0.2 ppm |
0.2 to
5.0 ppm |
5.0 to
16.5 ppm |
|
| Number of Pump Strokes |
|
| Correction Factor |
|
| Sampling Time |
2 minutes per pump stroke |
| Detecting Limit |
0.01 ppm (n=8) |
| Colour Change |
White → Yellowish orange |
| Reaction Principle |
NO + Cr6+ + H2SO4 →NO2
NO2 + o-Tolidine → Yellowish orange product |
| Coefficient of Variation |
10% (for 0.2 to 1 ppm), 5% (for 1 to 5 ppm) |
| Shelf Life |
3 Years |
| Corrections for temperature & humidity |
Unnecessary |
| Store the tubes at cool and dark place. |
Possible coexisting substances and their interferences
(NOTE)
| Substance |
Concentration |
Interference |
Change colour by itself to |
Chlorine, Bromine,
Chlorine dioxide |
|
+ |
Yellowish orange |
| sulphur dioxide |
25 ppm |
 |
No |
| Hydrogen sulphide |
25 ppm |
|
No |
| Calibration gas generation |
Permeation tube method |
| TLV-TWA |
TLV-STEL |
Explosive range |
NO2: 0.2 ppm(2014)
NO: 25 ppm(2014) |
- |
- |
