Indicator: 10 ~ 100 ppm
Measuring Range: 1 ~ 100 ppm
Sampling Hours: 1~10 hours
Colour Change: Yellow → Purple
Reaction Principle: HF + Indicator → Purple product
Coefficient of Variation: 15% (for 10 to 20 ppm-hr),10% (for 20 to 100 ppm-hr)
Nr. of tests: 10
Detail
Performance
| Measuring Range | 1 to 100 ppm |
| Sampling Hours | 1 to 10 hours |
| Detecting Limit | 0.5 ppm (10 hours) |
| Colour Change | Yellow → Purple |
| Reaction Principle | HF + Indicator → Purple product |
| Coefficient of Variation | 15% (for 10 to 20 ppm-hr),10% (for 20 to 100 ppm-hr) |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Temperature and Humidity correction is necessary |
| Store the tubes at cool and dark place. | |
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Chlorine | ≧ 1/5 | +(Bleaches zero zone) | Bleaches zero zone |
| Hydrogen chloride Nitric acid |
≧ 1/5 | + | Purple |
Other substance measurable with this detector tube
| Substance | Correction Factor | Measuring Range |
| Nitric acid | 0.32 | 0.32 to 32 ppm |
| Hydrogen chloride | 0.4 | 0.4 to 40 ppm |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| 0.5ppm (2015) | C 2 ppm (2015) | - |
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