AU test gas for analyzers – precision for regular exhaust emissions testing
Regular exhaust emissions testing (AU) is a key component of emissions control for motor vehicles and serves to ensure compliance with statutory exhaust emission limits in accordance with the emission standards applicable in Europe (e.g., Euro 6/7). With the ever-increasing volume of traffic, there is a growing need to reliably monitor emissions such as carbon monoxide (CO), carbon dioxide (CO₂), and hydrocarbons (HC).
Precise exhaust gas analyzers are used to perform AU. To ensure the long-term measurement accuracy and functionality of these devices, the use of certified AU test gases for the analyzers is mandatory. These calibration gases contain precisely defined concentrations of the relevant exhaust gas components and are used for regular adjustment and verification of the measuring systems.
Lambdamix – certified AU test gas for maximum measurement reliability
With Lambdamix, Messer offers a specially developed AU test gas for analyzers that is ideally suited to the requirements of modern exhaust gas measurement systems. The composition of Lambdamix enables the precise calibration of measuring units as part of regular exhaust gas testing.
Technical properties of Lambdamix:
- Exact concentrations of CO, CO₂, HC, O₂ (optionally also NO) and narrow tolerances (±1–2 %)
- Available with a certificate from a testing laboratory accredited according to EN ISO/IEC 17025
- Long stability and traceability to national standards
- Compatible with common AU analysis technology according to ISO 3930
In many countries, the use of AU test gases with an accredited certificate is required by law in order to be able to document the AU test results legally. Lambdamix meets these requirements and is, therefore, the reliable choice for testing centers, automotive workshops, and measuring device manufacturers.
Messer – your partner for AU test gases, Lambdamix, and vehicle emissions monitoring
Messer develops and produces AU test gases for analyzers in consistently high quality – with precise gas dosing, accredited analysis, and complete batch documentation. Our Lambdamix product line meets all technical and regulatory requirements for vehicle emission measurement technology – for OEMs as well as testing organizations and specialist workshops.
Our technical advantages at a glance:
- Manufactured under ISO 9001 and ISO 17025 controlled conditions
- Flexible mixture compositions for different vehicle and test classes
- Delivery units ranging from disposable bottles to 50-liter steel cylinders
- Technical advice on selection, implementation, and interpretation of regulations
