Nitrogen Dioxide (NO2) Detection Tubes (0.5 to 125 ppm)
Gastec Detection Tube No. 9L measures Nitrogen Dioxide with a Range of 0.5 to 125 ppm.
- Measuring Range: 0.5 to 30 ppm, 30 to 125 ppm
- Number of Pump Strokes: 2, 1
- Correction Factor: 1, by scale
- Sampling Time: 30 seconds per pump stroke
- Detecting Limit: 0.1 ppm (2 pump strokes)
- Changes from White to Yellowish Orange
- Corrections for temperature & humidity: Unnecessary
- Reaction Principle: NO2 + o-Tolidine → Nitroso-o-Tolidine
- Relative Standard Deviation: 10% (for 0.5 to 10 ppm), 5% (for 10 to 30 ppm)
- 3 Year Shelf Life
- Store the tubes at cool and dark place.
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Bromine, Chlorine |
≧ 1/5 |
+ |
Yellowish orange |
| Nitric oxide |
≧ 50 ppm |
Unclear demarcation |
Pale red |
| Ammonia |
|
No |
No |
| Carbon dioxide |
|
No |
No |
| Carbon monoxide |
|
No |
No |
| Organic gases and vapor |
|
No |
No |
| Sulfur dioxide |
≧ 10 ppm |
- (Bleaching) |
No |
Other substance measurable with this detector tube:
| Substance: |
Correction Factor: |
No of Pump Strokes: |
Measuring Range: |
| Iodine |
0.4 |
2 |
0.2 to 12 ppm |
Nitrogen Dioxide (NO2) Detection Tubes (0.5 to 125 ppm)
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