High Accuracy Gas Mixture — tight tolerances and low uncertainty for demanding work
A high accuracy gas mixture from REAL GAZ is produced when the standard itself becomes a critical part of the measurement chain. Tolerances can be as tight as 1% relative, with expanded uncertainties reported alongside the certified value.
Such mixtures are used to calibrate other standards, to verify instruments and to support research where small errors matter.
Such mixtures are used to calibrate other standards, to verify instruments and to support research where small errors matter.
Accuracy depends on every step. Pure components are analysed before use, cylinders are conditioned to limit adsorption, and balances are checked with traceable masses. Final concentration is confirmed by comparison with reference mixtures, and stability testing is performed for reactive components. Where a mixture cannot hold its value reliably, we say so and propose a shorter shelf life or alternative formulation. High accuracy has practical limits that we discuss openly. Some components, such as nitrogen dioxide, ammonia or low-level sulphur compounds, are inherently less stable than methane or carbon dioxide, so the achievable uncertainty differs. We recommend re-analysis of long-stored cylinders and offer follow-up verification on request. Customers can also ask for the weighing data underlying the certificate, which allows an independent check of the uncertainty budget and supports internal quality audits.
REAL GAZ supplies this product according to ISO 6142-1, ISO 6143, ISO 19229 for purity analysis and stability, and ISO 17025 practice, suitable for metrology and reference work.
🏭 Where High-Accuracy Mixtures Are Used
- 📏 Reference laboratories — working standards used to calibrate secondary mixtures and instruments;
- 🧑🔬 Atmospheric research — greenhouse gas and trace standards for long-term monitoring programmes;
- 🏛️ Regulatory testing — audit-quality reference gases for emission and air-quality compliance checks;
- 🔋 Energy trading and custody — natural gas standards that underpin calorific value measurement.
💡 Why Choose REAL GAZ
- ✅ Low uncertainty — careful preparation delivers certified values with narrow uncertainty bands;
- 🧪 Verified stability — reactive mixtures are tested over time so the expiry date is realistic;
- 🎯 Comparison data — results are tied to reference standards and recorded in detail;
- 🔒 Specialist support — metrologists can discuss uncertainty budgets and acceptance criteria with you;
- 📄 Certificate of Analysis (CoA) — reporting certified values, expanded uncertainty and traceability statements.
🔬 Quality Control & Safety
- analysis and qualification of pure components;
- gravimetric preparation on checked balances;
- comparison with reference standards;
- stability assessment and leak testing.
Cylinders comply with ADR / UN transport rules and relevant EN/ISO standards.
⚙️ Trusted Gas Solutions
REAL GAZ offers high accuracy gas mixture products for reference laboratories, regulators and demanding industrial users in Azerbaijan, Turkey, Georgia, Uzbekistan and the USA. Contact us with your uncertainty requirement and we will advise what is realistically achievable.
REAL GAZ — accuracy, documented and defended.