Gastec 5LC Quick-measuring Detector tubes Sulphur dioxide SO2 (0.1-25 ppm)
ManufacturerGastec(View more products from this manufacturer)
Model5LC
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Indicator: 0.5 to 10 ppm
Measuring Range:
+ 0.1 to 0.25 ppm, Number of Pump Strokes 4
+ 0.25 to 10 ppm, Number of Pump Strokes 2
+ 10 to 25 ppm, Number of Pump Strokes 1
Sampling Time: 2 minute per pump stroke
Colour Change: Bluish purple → White
Reaction Principle: SO2 +I2 +2H2O → H2SO4 + 2HCl
Coefficient of Variation: 10% (for 0.25 to 2 ppm), 5% (for 2 to 10 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 | 2 minutes per pump stroke | |||
| Detecting Limit | 0.02 ppm (n=4) | |||
| Colour Change | Bluish purple → White | |||
| Reaction Principle | SO2 +I2 +2H2O → H2SO4 + 2HCl | |||
| Coefficient of Variation | 10% (for 0.25 to 2 ppm), 5% (for 2 to 10 ppm) | |||
| Shelf Life | 3 Years | |||
| Corrections for temperature & humidity | Temperature 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 |
| Nitrogen dioxide |  (Unclear demarcation) |
Brown (approx.1mm long from the inlet) | |
| Hydrogen sulphide | ≧ 1/10 | + | White |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| - | 0.25 ppm (2014) | - |
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