Precision Ar-CO₂ Gas Blend — tightly toleranced argon and carbon dioxide mixtures
A Precision Ar-CO₂ Gas Blend is an argon base gas carrying a carefully weighed fraction of carbon dioxide, prepared so that the stated composition holds to a narrow tolerance from the first litre to the last.
Every cylinder is filled by gravimetric blending and verified by gas chromatography, so the certified value can be relied on for calibration and for demanding process work.
Every cylinder is filled by gravimetric blending and verified by gas chromatography, so the certified value can be relied on for calibration and for demanding process work.
Composition is traceable through ISO 6142-1 gravimetric preparation, verified in line with ISO 6143 and reported under a laboratory system aligned with ISO 17025, for analytical and process-control use.
Typical CO₂ values range from 50 ppm for trace analysis through 1%, 5% and 10% for process verification, up to 20% for shielding-gas audits, with the remainder high purity argon. Calibration cylinders are usually supplied in 10 or 20 litre aluminium cylinders at 150 bar, which gives a long service life for instruments with low sample flow. Store cylinders upright in a ventilated room between 5 °C and 35 °C and avoid placing them close to heat sources, because strong temperature swings can affect pressure and, at higher CO₂ levels, the condition of the mixture. Use a stainless steel regulator with a clean, dry line and purge it before measuring.
Because small errors in a reference gas pass directly into every measurement made with it, each certificate also records the filling date and the recommended validity period, which helps your quality team plan re-certification before the cylinder is exhausted or its shelf life ends.
🏭 Where Precision Ar-CO₂ Blends Are Used
- ⚙️ Analyser calibration — span gas for infrared CO₂ analysers and combustion monitors that must be checked against a known concentration;
- 🔬 Method validation — reference mixture for laboratories proving linearity, repeatability and detection limits of gas chromatographs;
- 🏭 Process quality audits — benchmark blend used to confirm that on-site shielding gas mixers deliver the ratio the weld procedure requires;
- 🚀 Research and development — stable, documented atmosphere for materials trials in which small changes in CO₂ content alter the result.
💡 Why Choose REAL GAZ
- ✅ Tight tolerance — relative uncertainty is stated for each component, so your own uncertainty budget starts from solid numbers;
- 🧪 Stable composition — cylinder interiors are conditioned to limit adsorption of CO₂ and keep the mixture homogeneous over its shelf life;
- 🎯 Choice of concentration — CO₂ levels from trace amounts up to typical welding percentages can be prepared to your specification;
- 🔒 Traceable records — batch, filling date and analytical data are logged so any cylinder can be traced back to its preparation.
- 📄 Certificate of Analysis (CoA) — supplied with every order.
🔬 Quality Control & Safety
- gravimetric weighing on calibrated balances;
- gas chromatographic verification of each component;
- dew point and trace moisture checks;
- valve leak testing and pressure integrity checks.
Cylinders comply with ADR / UN transport rules and relevant EN/ISO standards.
⚙️ Trusted Gas Solutions
From precision calibration standards to production reference gas, our Precision Ar-CO₂ Gas Blend is prepared to the tolerance you specify and delivered with full documentation to customers in Azerbaijan, Turkey, Georgia, Uzbekistan and the USA. Our technical team can help you choose the concentration range, cylinder size and valve outlet that suit your instrument or process, and can advise on how often a reference cylinder should be re-certified.
REAL GAZ — Exact composition, documented every time.