EPI thermal mass flow meters measure mass flow directly and aren’t thrown off by changes in line pressure. Configure one for hazardous areas, high-purity lines, extreme heat or large stacks.
Seven series share EPI’s sensor technology. Choose by where the meter will be installed and what it needs to withstand, then configure the details online.
Explosion-proof diecast aluminum enclosure certified to CSA/CUS, ATEX, IECEx and KOSHA, with stainless steel wetted parts.
Inline 1/4–4"
Insertion 1 1/2" and up
Corrosion-resistant, watertight enclosure for ordinary, non-hazardous locations. CSA/CUS approved.
Inline 1/4–4"
Insertion 1 1/2" and up
The same accurate sensor at a lower cost, for applications that don’t need advanced features.
Inline 1/4–4"
Insertion 1 1/2" and up
Engineered for ultra high-purity gas lines, in explosion-proof or NEMA 4X (IP66) enclosures.
Inline 1/4–4"
View PURE metersMeasures gas flow in extreme process temperatures, with optional remote electronics.
Insertion 1 1/2" and up
View XT metersSeveral sensor assemblies feed one remote control panel for accurate readings across large pipes, ducts and stacks.
Insertion 2" and up
View MULTIGENMonitors gas flow and trips at your set point, in an explosion-proof enclosure.
Inline 1/4–4"
Insertion 1 1/2" and up
Need a configuration you don’t see? EPI builds custom meters for most application requirements.
Ask about a custom meterTwo pieces of engineering do the work: a matched pair of platinum sensors, and a patented tube that averages flow across the whole pipe.
Each sensor uses two ratiometrically matched, reference-grade platinum RTDs sheathed in 316 stainless steel, or Hastelloy C when needed. One is heated; the other tracks gas temperature. As gas carries heat away, the power needed to hold the difference rises in proportion to mass flow, so the reading is true mass flow, not volume.
Read the full guide to flow metersA row of inlet ports along the probe samples flow at several points across the pipe. The pressure from each port is averaged inside the tube, so the sensor sees the true average flow. In many systems the upstream straight run can drop to as little as three pipe diameters, which helps where space is tight.
Explore EPI technology
Every EPI meter is built by experienced specialists in the United States and goes through extensive testing and calibration before it’s signed off and shipped.
“We use the air flow meter to measure and achieve a specific air-to-water treatment ratio, with air flows of up to 4,000 SCFM. It has functioned with minimal fluctuation in measurements, and we’ve had a good experience with the FAT probe at our treatment plant.”
Share your gas, line size and operating conditions, and EPI’s team will recommend and quote the right meter.