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With a licence to test: Specidur®-CO for AU test gases from Westfalen.

Test gases for the calibration of exhaust gas measuring instruments: DAkkS-compliant and with calibration certificate.

Do you calibrate devices for exhaust gas testing? Do you need test gases with a calibration certificate for this? Then Westfalen is the right partner for you! Our Specidur® CO for AU series meets the highest quality requirements and can be ordered quickly and easily via our online shop.

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Accreditation as calibration laboratory and manufacturer of reference materials.

Clear rules apply to exhaust emission tests: Since 2019, exhaust gas measuring devices are required to be calibrated by an accredited provider in accordance with the standards. This requires test gases that are accredited in accordance with DIN ISO/EC 17025. Our Specidur® series meets these requirements and is supplied with a DAkkS calibration certificate. In addition, the German Accreditation Body (DAkkS) has accredited us as a manufacturer of certified reference materials in accordance with DIN EN ISO 17034. This means that our special gases centre has provided proof of competence at the highest national and international level.

5 benefits for you: DAkkS-compliant gases from Westfalen.

Ensuring the highest quality in the controlled range
Reliable, reproducible and comparable measurement results
Traceability to national and international standards
Proof of competence
Wide range of accredited gas mixtures

What the calibration certificate displays.

The calibration certificate displays the test result of your gas. In addition to the measurement results and the measurement uncertainties, it also lists the calibration procedure, the measurement conditions and the reference standard. Furthermore, the calibration certificate documents the traceability to national standards.

For simplified transport: test gases in 3-litre bottles, safely packed in the T03 Smartbox.

Our 3-litre bottle for your test gases is lighter and more handy than the conventional 10-litre container, so it is ideal for mobile use when testing the AU testers. In addition to two or three gas cylinders, a pressure reducer and a hose for gas extraction fit into the transport case. The 3-litre bottle is UN-marked, so it can be transported by sea and air. Would you like to know more? Then get in touch with us!

FAQs: Frequently asked questions and our answers.

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Where can I find product and safety data sheets?

Our product and safety data sheets are available for you in our online shop. Search and navigation also work without logging in. You will find the files at the respective product under "Downloads".

Where can I find an overview of the available test gases according to DAkkS accreditation?

Tabular overviews of our test gases according to DIN EN ISO/IEC 17025 with presentation of measurand, measuring range, measuring conditions and measurement uncertainty can be found in our brochure "Your safety through our quality". In addition, we list our certified reference materials according to DIN EN ISO 17034 (AU gases and environmental gases) in the document.

In which cylinders does Westfalen offer calibration and test gas?

You can find an overview of the available container sizes in our online shop. Search and navigation also work without logging in. The information can be found on the respective product under "Delivery forms". We also offer detailed information on the advantages of our Alumini® small containers.

Does Westfalen also offer accessories for the use of calibration and test gas?

Yes, you can also get equipment for transport, gas extraction and safety from us - from pressure regulators and connections to practical cases and gas detectors. Our experts will be happy to advise you!

Can I order test gas and calibration gas online?

Our standard gas mixtures, such as our gas products for calibrating gas sensors, test gases for AU devices or operating gases for emission measurement, are available with just a few clicks via our online shop. For individual customer mixtures, please contact us personally - we look forward to hearing from you! After your initial order, you can also place repeat orders for your customised products via the online shop.