Carbon Dioxide (CO2)
Carbon dioxide (chemical formula CO2) is a colorless gas with a density about 60% higher than that of dry air. Carbon dioxide consists of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth’s atmosphere as a trace gas. The current concentration is about 0.04% (410 ppm) by volume, having risen from pre-industrial levels of 280 ppm. Natural sources include volcanoes, hot springs and geysers, and it is freed from carbonate rocks by dissolution in water and acids. Because carbon dioxide is soluble in water, it occurs naturally in groundwater, rivers and lakes, ice caps, glaciers and seawater. It is present in deposits of petroleum and natural gas. Carbon dioxide is odorless at normally encountered concentrations, but at high concentrations, it has a sharp and acidic odor.
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.
Carbon Dioxide Calibration Gases
| 34L | 58L | 110L | Cert. tol. | Prod. tol. | Stability (months) |
|
|---|---|---|---|---|---|---|
| 500 ppm Carbon dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 500 ppm Carbon dioxide // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 1000 ppm Carbon dioxide // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 5000 ppm Carbon dioxide // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 5000 ppm Carbon dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 1 % Carbon dioxide // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 1 % Carbon dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 1.5 % Carbon dioxide // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 2 % Carbon dioxide // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 2 % Carbon dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 3 % Carbon dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 3 % Carbon dioxide // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 5 % Carbon dioxide // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 5 % Carbon dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 10 % Carbon dioxide // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 10 % Carbon dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 18 % Carbon dioxide // Argon | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 20 % Carbon dioxide // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 30 % Carbon dioxide // Argon | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 40 % Carbon dioxide // Methane | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 50 % Carbon dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 50 % Carbon dioxide // Methane | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 60 % Carbon dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 80 % Carbon dioxide // Nitrogen | Available | Available | Available | +/- 2% | +/- 5% | 60 |
| 100 % Carbon dioxide (3.0) | Available | Available | Available | N/A | N/A | 60 |
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