Sulphur dioxide |
NO.5M |
Measuring Range |
|
|||
Number of Pump Strokes |
|
|||
Correction Factor |
|
|||
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 |
2 ppm | 5 ppm | - |