Eldridge Products

What Eldridge Products does

Eldridge Products, Inc. (EPI) is a privately held US manufacturer of thermal mass flow meters and flow switches, founded in 1988 and headquartered in Marina, California. The company's instruments measure gas mass flow using convective heat transfer theory, employing two ratiometrically matched reference-grade platinum Resistance Temperature Detectors (RTDs) inside 316 Stainless Steel or Hastelloy C sheaths, controlled by microprocessor-based sensor electronics. Its proprietary, patented Flow Averaging Tube (FAT) architecture averages pressure across multiple probe entry ports to produce axial flow, enabling accurate mass flow measurement with straight-run requirements reduced to three pipe diameters — a meaningful advantage in space-constrained industrial installations. The product portfolio is organized into application-specialized series (EPI-HAZ for hazardous locations, EPI-PURE for ultra-high-purity, EPI-XT for high temperature, EPI-MULTIGEN for large multi-point ducts and stacks, EPI-GEN for general-purpose, EPI-VAL for cost-sensitive applications, and EPI-SWITCH for switching), available in Inline and Insertion form factors with global certifications (CSA/CUS, ATEX, IECEx, KOSHA) and NEMA 4X/IP66 or explosion-proof enclosures.

EPI manufactures all of its meters at a single ISO 9001:2015-certified facility in Marina, California, and sells through an enterprise field-sales motion combining direct website/configurator-based sales with a regional representative network. Revenue is generated primarily through customized hardware sales — with premium fully validated sanitary-grade instruments priced in the $4,000–$8,000 range per third-party market data — supplemented by calibration services, extended warranties, spare parts, and ten years of technical support. End-markets span biopharmaceutical and drug manufacturing (a primary and structurally growing segment), industrial process and manufacturing, environmental remediation/water treatment, and government/research facilities, with named reference customers including the MIT Reactor Laboratory (stack-effluent monitoring) and Tetra Tech (air-stripping remediation). The company is independently owned, has reported no external funding, and operates with a headcount of 11–50 employees.

Name

Eldridge Products

Legal name

Eldridge Products, Inc.

Website

https://epiflow.com

Company type

Private

Founded year

1988

Operating status

Operating

Headcount range

11–50 employees

Short description

Eldridge Products, Inc. (EPI) designs and manufactures thermal mass flow meters and flow switches, using patented Flow Averaging Tube technology and platinum RTD sensors, serving industrial, biopharmaceutical, government, and environmental remediation customers with instruments produced at its Marina, California facility.

Ownership category

akta.pro rank

Headquarters

HQ city

Marina

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Thermal Mass Flow Meter Sales: Manufacture and sale of thermal mass flow meters and flow switches. Products are customized per customer application requirements and sold as complete instruments with various certifications (hazardous location, general purpose, high purity, high temperature). Revenue is generated from one-time hardware purchases with potential for aftermarket services.
2. Aftermarket Services: Includes calibration services, technical support, extended warranties, and spare parts. The company offers one-year complimentary warranty with extended warranties available through their meter customizer, and ten years of technical assistance and remote help.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Eldridge Products (EPI) designs and manufactures thermal mass flow meters and flow switches for industrial gas flow measurement. Each meter is built to order using proprietary thermal mass flow sensing technology based on convective heat transfer, with two ratiometrically matched reference-grade platinum RTDs housed in stainless steel or Hastelloy C sheaths. The product portfolio is organized into specialized series certified for hazardous locations, general purpose, high purity, high temperature, and multi-sensor applications, with international certification coverage including CSA/CUS, ATEX, IECEx, and KOSHA.

Product overview

Eldridge Products (EPI) offers a comprehensive portfolio of thermal mass flow meters and flow switches designed for gas flow measurement applications. The product lineup is organized into specialized series: EPI-HAZ for hazardous locations (explosion-proof), EPI-GEN for general/ordinary locations, EPI-VAL (ValuMass) for high-value economical applications, EPI-PURE for ultra-high purity applications, EPI-XT for extreme temperature environments, EPI-MULTIGEN for large multi-point installations, and EPI-SWITCH for flow monitoring. Each series is available in multiple configurations including Inline and Insertion styles, with Remote Electronics (R) options, and many incorporating EPI's proprietary Flow Averaging Tube (FAT) technology. Products feature various enclosure ratings including explosion-proof, NEMA 4X/IP66, and are certified to multiple international standards including CSA/CUS, ATEX, IECEx, and KOSHA. All products are manufactured in the USA and backed by an ISO 9001:2015 certified quality management system.

Differentiator

Problem solved

Functional benefit

Products and services

• EPI-HAZ Thermal Mass Flow Meters Hazardous Locations flow meters certified for flame-proof locations with diecast aluminum explosion-proof enclosure, certified to CSA/CUS, ATEX, IECEx, and KOSHA standards. Available in Inline and Insertion configurations with stainless steel wetted materials and optional Hastelloy C-276, intended for process and environmental monitoring in hazardous-area industrial installations.
• EPI-GEN Thermal Mass Flow Meters General/Ordinary Locations flow meters certified for non-hazardous use and CSA/CUS Class 2252-03 & 2252-80 approved, with a corrosion resistant watertight enclosure. Available in Inline and Insertion configurations, suited to standard industrial gas flow measurement applications without hazardous-location requirements.
• EPI-VAL (ValuMass) Thermal Mass Flow Meters High-value, lower-cost alternative thermal mass flow meters using the same accurate sensor technology as other EPI products but offering a more economical solution. Configurable with explosion-proof rated enclosure (LM) or NEMA 4X rated IP66 enclosure (RB) options, intended for cost-sensitive industrial deployments that still require EPI-grade accuracy.
• EPI-PURE Thermal Mass Flow Meters High-purity thermal mass flow meters specifically engineered for ultra high-purity applications such as semiconductor and biopharmaceutical processes. Available with explosion-proof rated enclosure or NEMA 4X rated IP66 enclosure, configured for clean, contamination-sensitive gas flow measurement.
• EPI-XT High Temperature Thermal Mass Flow Meters High-temperature thermal mass flow meters designed to measure gas flow in extreme temperature environments. Includes models such as the 525CR (with explosion-proof enclosure and remote electronics) and the 200C (with explosion-proof enclosure), targeting high-temperature industrial process applications.
• EPI-MULTIGEN Multi-Point Thermal Mass Flow Meters Multi-point flow meters using multiple connected sensor assemblies tied to a remote control panel for metering large pipes, ducts, and stack applications. Provides accurate flow measurement across large diameter installations where a single insertion probe would be insufficient, including nuclear facility stack emissions monitoring applications.
• EPI-SWITCH Flow Switches Flow switches built with explosion-proof rated enclosures for monitoring gas flow. Available in Inline and Insertion configurations to detect flow presence/absence in industrial process and safety applications.

Quantifiable outcome

• 2-5% tolerance for calibration verification via live zero validation feature
• +2 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Fluid Components International (FCI): FCI is a direct competitor to EPI, specializing in thermal mass flow meters and thermal dispersion flow instrumentation for industrial process, emissions, and wastewater applications with a comparable focus on patented thermal dispersion sensor technology.
• Sierra Instruments (now part of Baker Hughes): Sierra Instruments is one of the closest direct peers to EPI, historically focused on thermal mass flow meters for industrial gas flow measurement, now operating as part of Baker Hughes' precision sensing portfolio.
• Bronkhorst: Bronkhorst specializes in thermal mass flow controllers and meters for low-flow gas and liquid applications, overlapping with EPI in the thermal mass flow technology category and serving analytical, laboratory, and biopharma markets.
• Aalborg Instruments: Aalborg Instruments designs and manufactures thermal mass flow controllers and meters, directly comparable to EPI in technology platform and target applications including biopharma and industrial gas flow.
• Teledyne Hastings Instruments: Teledyne Hastings Instruments manufactures thermal mass flow controllers and meters for gas flow measurement, sharing EPI's thermal dispersion sensing technology and competing in similar analytical and process applications.

Broad incumbents

• Endress+Hauser: Endress+Hauser is a global instrumentation incumbent offering a broad portfolio of flow, level, pressure, and analytical instruments including thermal mass flow meters, competing with EPI across industrial and process markets through greater scale and global service infrastructure.
• Emerson Automation Solutions (Rosemount / Micro Motion): Emerson's Rosemount and Micro Motion brands cover the full flow measurement spectrum including Coriolis, magnetic, vortex, and thermal technologies, competing with EPI in process and biopharma applications as a broad-line incumbent.
• KROHNE: KROHNE is a global process instrumentation manufacturer offering thermal mass flow meters alongside Coriolis, ultrasonic, and electromagnetic flow technologies, competing with EPI across industrial and hazardous-location applications.
• Yokogawa Electric: Yokogawa offers a comprehensive process instrumentation portfolio including vortex, Coriolis, and magnetic flowmeters, overlapping with EPI's industrial process and hazardous-location applications as a broad-line automation incumbent.
• MKS Instruments (now part of MKS / Brooks Instrument): MKS Instruments, including the Brooks Instrument product line, offers thermal mass flow controllers and meters for semiconductor, biopharma, and industrial applications, competing with EPI in high-purity gas flow and validated biopharma instrumentation.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/epiflow

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Eldridge Products