Eldridge Products (EPI)

Why Choose Eldridge Products (EPI)?

EPI has built its reputation by focusing intently on thermal mass flow technology and the gas applications it serves best. Thermal mass meters measure flow directly in mass units (no need for separate temperature and pressure compensation), have no moving parts, and deliver excellent turndown on low flow rates — making them an ideal choice for applications ranging from compressed air audits to flare gas measurement to combustion air monitoring.

What Sets EPI Apart

• Thermal Mass Flow Specialists — Focused exclusively on thermal mass technology, with decades of refinement
• Direct Mass Flow Measurement — Measures mass directly with no separate pressure/temperature compensation needed
• No Moving Parts — Clean, low-maintenance design with no rotors or wear components
• Wide Turndown — Excellent accuracy across a broad flow range — particularly strong at low flow rates
• Insertion and Inline Options — Insertion probes for pipes up to many feet in diameter and inline flow bodies for smaller lines
• Hazardous Area Approvals — FM, CSA, ATEX, and IECEx-certified products for installations in Class I Division 1/2 and Zone 0/1/2 environments
• Made in the USA — Domestic manufacturing in California with U.S.-based engineering and support
• Application-Specific Calibration — Meters calibrated for the specific gas mix and conditions of your installation

Common Applications

• Compressed Air Measurement — Energy audits, leak detection, and consumption monitoring
• Natural Gas Submetering — Building, plant, and process-line gas measurement
• Flare Gas Monitoring — Required measurement for EPA flare regulations
• Biogas / Digester Gas — Wastewater treatment and renewable natural gas applications
• Combustion Air Measurement — Boiler, furnace, and oxidizer optimization
• Vent and Stack Gas Monitoring — Emissions and environmental compliance
• Process Gas Measurement — Chemical, petrochemical, and manufacturing process gases
• HVAC Air Flow — Duct flow measurement for large commercial and industrial systems

Common Industries

EPI thermal mass flow meters are deployed across a wide range of industries, including:

• Oil & gas production, refining, and midstream operations
• Wastewater treatment and biogas production
• Chemical and petrochemical processing
• Power generation and combustion systems
• Manufacturing and industrial plants
• Building energy management
• Environmental and emissions monitoring