EPA Protocol Gases

As the largest U.S. supplier of specialty gases and the largest supplier of EPA Protocols, Airgas, an Air Liquide company, has the expertise you need to simplify environmental compliance.

Whether you’re an environmental manager at a power utility, an environmental specialist, a RATA tester or a government employee, we offer a wide range of environment monitoring gases to meet your needs.

We produce our own EPA Protocols in six strategically placed laboratories, part of our network of more than 70 specialty gas facilities nationwide. Approximately three quarters of our labs are ISO 9001 registered and eight are also ISO/IEC 17025 accredited.

Raising the standard

Airgas EPA Protocols are prepared and analyzed in strict accordance with the EPA Traceability Protocol Assay and Certification of Gaseous Calibration Standards. All Airgas EPA Protocols produced for the utilities market are certified to +/- 1% overall uncertainty guarantee.

Our dedication to high standards is also why The National Institute of Standards and Technology (NIST) trusts us to provide the Standard Reference Materials (SRMs) for gas mixtures. These serve as the basis for production of all EPA protocol gases used for calibrating emissions monitoring equipment.

Our labs have it down to a science with AcuGravTM

All of our specialty gas filling locations use AcuGravTM, our patented filling system that’s totally computerized and provides precise, quality gas mixtures every time. This technical achievement is radically changing what the specialty gas user can now expect in precision and quality.

The right supply modes

You can count on Airgas to meet your gas supply needs safely and reliably with a full range of supply modes, including:

  • High- and low-pressure cylinders
  • Portable liquid dewars
  • Airgas MicroBulk
  • On-site tube trailers