Gastec 18M Quick-measuring Detector tubes Ozone O3 (20~400ppm)
ManufacturerGastec(View more products from this manufacturer)
Model18M
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Indicator: 20 to 200 ppm
Measuring Range:
+ 4 to 20 ppm, Number of Pump Strokes 2 to 5
+ 20 to 200 ppm, Number of Pump Strokes 1
+ 200 to 400 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: Orange → Pale yellow
Reaction Principle: O3 + Indicator → Chemical reaction compound
Coefficient of Variation: 10% (for 20 to 60 ppm), 5% (for 60 to 200 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
Performance
| Measuring Range |
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| Number of Pump Strokes |
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| Correction Factor |
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| Sampling Time | 45 seconds per pump stroke | |||
| Detecting Limit | 1 ppm (n=5) | |||
| Colour Change | Orange → Pale yellow | |||
| Reaction Principle | O3 + Indicator → Chemical reaction compound | |||
| Coefficient of Variation | 10% (for 20 to 60 ppm), 5% (for 60 to 200 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 |
| Hydrogen chloride | No | Red | |
| Hydrogen fluoride | No | Red | |
| Boron trifluoride | No | Red | |
| Phosphine | No | Red | |
| Arsine | No | Red | |
| Chlorine | + | Pale yellow | |
| Nitrogen dioxide | + | Pale yellow |
| Calibration gas generation | Ozone generater |
| TLV-TWA | TLV-STEL | Explosive range |
| *1 | - | - |
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