Sulphur Dioxide (SO2)
Sulfur dioxide (also sulphur dioxide in British English) is the chemical compound with the formula SO2. It is a toxic gas responsible for the smell of burnt matches. It is released naturally by volcanic activity and is produced as a by-product of copper extraction and the burning of fossil fuels contaminated with sulfur compounds.
SEMA Gases is a manufacturer of span gases in disposable cylinder cans from the Netherlands, established from the want to create a label which is applicable for all brands of gas detection equipment. The products of SEMA Gases are used for calibration of portable gas detection instruments and calibration of fixed gas detection systems. SEMA Gases produces single gases (flammable gases, oxygen, toxic gases) and gas mixtures (2, 3, 4 or 5 gas mixtures) in various cylinder size up to 110 ltr.
Sulphur Dioxide Calibration Gases
| 34L | 58L | 110L | Cert. tol. | Prod. tol. | Stability (months) |
|
|---|---|---|---|---|---|---|
| 10 ppm Sulphur Dioxide // Nitrogen | Available | Available | Available | +/- 10% | +/- 20% | 24 |
| 20 ppm Sulphur Dioxide // Nitrogen | Available | Available | Available | +/- 10% | +/- 20% | 24 |
| 100 ppm Sulphur Dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 10% | 24 |
| 2000 ppm Sulphur Dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 24 |
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