Precision Compressed Air — tightly toleranced air for calibration and metrology
Precision compressed air from REAL GAZ is prepared with narrow tolerances on oxygen content and very low trace impurities, serving users who need the same result on every test day.
Each batch is verified by analysis so the composition on the certificate can be relied on.
Each batch is verified by analysis so the composition on the certificate can be relied on.
Preparation follows ISO 6142 gravimetry, verification according to ISO 6143 and laboratory competence in the spirit of ISO 17025.
In calibration, small differences matter. A 20.9 % oxygen reading, for example, serves as a convenient span point because it matches ambient air, but only if the reference is really held at that value. We therefore express composition with an uncertainty and keep the cylinders under controlled conditions. Aluminium cylinders with passivated interiors are preferred when the mixture contains trace components, as they limit adsorption. Customers with accredited laboratories can request documentation that supports their own traceability chain. Where a tailored composition is required, such as air with a stated carbon dioxide content, we can prepare it as a custom mixture. Please state the required oxygen tolerance when ordering, because tighter bands need longer preparation. We will confirm the achievable uncertainty before you commit, and supply the matching analysis record, so that your own calibration report can reference it without additional correspondence.
🏭 Where Precision Air Mixtures Are Used
- ⚙️ Gas analyser calibration — oxygen analysers are set against air with a stated 20.9 % content to verify linearity;
- 🔬 Metrology and reference work — calibration laboratories use stable air as a reference matrix for transfer standards;
- 🏥 Sensor manufacturing — gas sensors are characterised in air with known humidity and composition before they are shipped;
- 🚀 Dust and emission testing — sampling equipment is baseline-checked with clean air before field campaigns.
💡 Why Choose REAL GAZ
- ✅ Narrow tolerance — oxygen and nitrogen ratios are held within a published tolerance band;
- 🧪 Stable shelf life — treated cylinder interiors keep composition steady over the stated period;
- 🎯 Full traceability — lot numbers link the cylinder to blending and analysis records;
- 🔒 Application advice — our chemists help you pick the tolerance class that matches your uncertainty budget;
- 📄 Certificate of Analysis (CoA) — supplied with every order.
🔬 Quality Control & Safety
- precision gravimetric blending;
- analysis against certified reference gases;
- moisture content control;
- cylinder leak testing and stability monitoring.
Cylinders comply with ADR / UN transport rules and relevant EN/ISO standards.
⚙️ Trusted Gas Solutions
When accuracy matters, precision compressed air from REAL GAZ gives laboratories and manufacturers in Azerbaijan, Turkey, Georgia, Uzbekistan and the USA a defined, documented reference gas rather than an approximate one.
REAL GAZ — Exact air for exact measurement.