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Indicator: 100 to 1800 ppm
Measuring Range:
+ 20 to 100 ppm, Number of Pump Strokes 4
+ 100 to 1800 ppm, Number of Pump Strokes 1
+ 1800 to 3600 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: Purple → Yellow
Reaction Principle: SO2 + BaCl2 +H2O → BaSO3 + 2HC, HCl+Base → Chloride
Coefficient of Variation: 10% (100 ~ 600 ppm), 5% (600 ~ 1800 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
| 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 | 4 ppm (n=4) | |||
| Colour Change | Purple → Yellow | |||
| Reaction Principle | SO2 + BaCl2 +H2O → BaSO3 + 2HCl HCl+Base → Chloride |
|||
| Coefficient of Variation | 10% (for 100 to 600 ppm), 5% (for 600 to 1800 ppm) | |||
| Shelf Life | 3 Years | |||
| Corrections for temperature & humidity | Temperature correction is necessary | |||
| Store the tubes at cool and dark place. | ||||
| Substance | Concentration | Interference | Change colour by itself to |
| Carbon monoxide, Nitric oxide |
No | No | |
| Carbon dioxide | No | No | |
| Nitrogen dioxide | ≧ 1/10 | + | White ( ≧ 600ppm) |
| Hydrogen sulphide | ≧ 10 times |  |
No |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| - | 0.25 ppm (2014) | - |
