Indicator: 100 ~ 2500 ppm
Measuring Range: 50 to 2500 ppm, Number of Pump Strokes 1
Sampling Time: 1.5 minute per pump stroke
Colour Change: White → Green
Reaction Principle: NO + Cr6+ + H2SO4 →NO2, NO2 + (C6H5)2NH → Green product
Coefficient of Variation: 10% (for 50 to 400 ppm), 5% (for 400 to 2500 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Catalog
Manual
Manual tube
Performance
| Measuring Range |
50 to 2500 ppm |
| Number of Pump Strokes |
1 |
| Correction Factor |
1 |
| Sampling Time |
1.5 minutes per pump stroke |
| Detecting Limit |
10 ppm (n=1) |
| Colour Change |
White → Green |
| Reaction Principle |
NO + Cr6+ + H2SO4 →NO2 NO2 + (C6H5)2NH → Green product |
| Coefficient of Variation |
10% (for 50 to 400 ppm), 5% (for 400 to 2500 ppm) |
| Shelf Life |
2 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 |
| Hydrogen chloride |
500 ppm |
Unclear demarcation |
Bluish purple ( 100 ppm) |
| Ozone |
200 ppm |
Unclear demarcation two layers |
Brown |
| sulphur dioxide, Hydrogen sulphide |
|
No |
No |
| Calibration gas generation |
High pressure gas cylinder method |
| TLV-TWA |
TLV-STEL |
Explosive range |
NO2: 0.2 ppm(2014) NO: 25 ppm(2014) |
- |
- |