• Register

EPA Protocol Gases

Helping You Keep in Compliance with Your Emission Testing
Contact an Expert

Achieve Cleaner Air Through Regulatory Compliance

Whether you're an environmental manager at a power utility, an environmental specialist, a RATA tester or a government employee, Air Liquide offers a wide range of environmental monitoring gases to meet your needs. Air Liquide EPA protocol gases are prepared and analyzed in strict accordance with the EPA’s most current guidelines. Our ISO 17025 certified laboratory allows us to manufacture gases with a ±1% overall uncertainty guarantee, specifically for the utilities market.

You can trust Air Liquide EPA protocol gases for their reliability, the National Institute of Standards and Technology (NIST) does. They chose Air Liquide to provide the Standard Reference Materials® (SRM) gas mixtures used worldwide to calibrate instruments, such as continuous emission monitoring systems (CEMS).

Air Liquide EPA protocol gas offer allows you to:

  • Ensure accurate measurements with direct NIST traceability standards.

  • Get standard and custom calibration mixtures including low-level single and multi-component.

  • Streamline your EPA protocol inventory via the largest producer of EPA protocol gases in Canada.

  • Tap into our technical capabilities and expertise to help you comply and control costs.

An aerial view of a lush green forest with a check mark symbol formed by a clearing and a small river. The check mark represents environmental conservation and sustainability efforts.

Guaranteed Certification and Stability

Air Liquide follows current revisions of EPA procedures G1 and G2 found in the EPA Traceability Protocol for Assay and Certification of Gaseous Calibration Standards dated September 1997. By incorporating rigorous quality assurance procedures and three decades of experience manufacturing environmental calibration mixtures, we are able to offer the most comprehensive portfolio of reactive and nonreactive protocol gases.

Contact Us

Metrology Standards Traceability Hierarchy

EPA Protocol Class Specifications

Blend tolerance ± %5
Analytical accuracy ± %1
Analytical traceabilityNIST reference standards
Component verificationLaboratory analysis of all minor components
Certificate of analysisAnalyzed concentrations, traceability and expiration date reported.

Recommended Applications for EPA Protocol Gases

  • Relative accuracy test audits (RATA)

  • Linearity checks

  • Stack monitor calibration

  • Cylinder gas audits (CGAs)

  • Ambient monitor calibration

  • Scrubber efficiency verification

  • Certification of CEM systems

  • Environmental auditing

Services to Help You Get the Job Done Right

  • Canadian Specialty Gas Laboratory: ISO/IEC 17025 accredited

  • Equipment Needs: CEM protocol equipment and regulators

  • Expertise across Canada: Regional specialty gas specialists

Our online services on airliquide.ca include:

  • Mixture Guide: Build your own EPA mixtures and request a quote easily. One of our team members will get back to you quickly.

  • View and pay your invoices: In a few clicks, access your invoice history and make payments if needed.

  • View your stock levels: In a few clicks, access your cylinder list.

  • Store locator: Easily find the closest store, distributor or depot to your location.

Don't have an airliquide.ca account? Create yours today and benefit from the previously mentioned advantages and more!