Eldridge Products Inc. was founded in June 1988 in Marina, California, by President and CEO Mark Eldridge. Today, with over 30 years of experience in the industry, EPI is the world’s premier manufacturer of thermal mass flow meters, switches, and metering software to solve your combustion, natural gas, compressed air and other flow needs.

With an ever-growing team of the industry’s best engineers, designers, and support specialists, EPI offers a full line of thermal mass flow metering products that are unparalleled in their accuracy, their ease of use, and their reliability. EPI thermal mass flow meters take the headache and complexity out of repeatable, accurate flow measurement and eliminate the need to worry about expensive system downtime.

For more information, visit the EPI website or fill out the contact form below.

Products Include:


Thermal mass flow meters offer users a way to meter their gas flows with a number of significant benefits including, but not limited to:
  • An extremely high degree of accuracy, generally within 1% of the total flow or better.
  • High reliability and low downtime due to a design that involves no moving parts.
  • An effectively negligible impact on overall pressure within the flow being measured.
  • The ability to accurately measure widely varying flow rates thanks to a low turndown ratio.
  • Easy installation and low maintenance requirements.