| Ozone | O3 | NO.18L | |
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| Performance |
|
Measuring Range |
0.025 to 0.05 ppm |
0.05 to 0.6 ppm |
0.6 to 3 ppm |
|
Number of Pump Strokes |
10 |
5 |
1 |
|
Correction Factor |
1/2 |
1 |
5 |
|
Sampling Time |
45 seconds per pump stroke |
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|
Detecting Limit |
0.01 ppm (n=10) |
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|
Color Change |
Blue |
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|
Reaction Principle |
Ozone reacts with indigo to form Isatin, which is white stain. |
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| Coefficient of Variation | 10% (for 0.05 to 0.2 ppm), 5% (for 0.2 to 0.6 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 color by itself |
|
Bromine |
1 ppm |
Plus error |
Produces White stain |
|
Hypochlorous acid |
- |
Plus error |
Produces White stain |
|
Nitrogen dioxide |
1 ppm |
Plus error |
Produces White stain |
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Oxidant |
- |
Plus error |
Produces White stain |
|
Chlorine |
10 ppm |
Plus error |
Produces unclear |
|
Water vapor |
100% relative humdity |
Plus error |
| Calibration gas generation | Ozone generater | |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.1ppm | - | - |
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| Copyright(c) 2001 GASTEC CORPORATION. All rights reserved. |
White
Chemical reaction product