Eldridge Products Inc.
Eldridge Products Inc.

Eldridge Flow Measurement

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Eldridge Flow Measurement was founded in June 1988 in Marina, California, by President and CEO Mark Eldridge. Today, with over 30 years of experience in the industry.

About Eldridge Products Inc

EPI is the world’s premier manufacture of thermal mass flow meters, switches, and metering software. With an ever-growing team of the industry’s best engineers, designers, and support specialists, EPI offers clients the reliable and accurate products they’d expect from a global leader coupled with the personal attention and dedicated service they’d expect from a family business.

At EPI, we understand the challenges our customers face every day when measuring thermal mass flows of all types. We also understand the opportunities that accurate measurement represents to both the bottom line and to the environment. With those challenges and opportunities always at the top of our minds, we’ve spent decades developing 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.

Equally as important to us as the quality of our products is the quality of our people and the relationships we build with our customers – customers who know that, with EPI, they aren’t just buying hardware or software; they’re gaining a true partner. At the core of everything we do is the understanding that our customers’ success and our own are inextricably linked, and it’s that knowledge that drives our unwavering commitment to offering the best thermal mass flow meters and the best service the industry has to offer.

Technical Information About EPI

Flow Meter Considerations for Flow Conditions

Flow meter considerations must be understood for your flow conditions. You must be sure to include certain parameters for the flow meter to be properly matched to your application. Please refer to the information below when requesting a quote, or you can submit our Application Data Sheet by email or fax. The category descriptions below will help you specify the proper flow meter:

Gas Composition

Flow Meter Considerations for gas are simple if you are flowing air or a pure gas such as hydrogen, nitrogen, etc. Gas mixtures should be provided with each gas listed as a percent of the total, with the sum equal to 100%. Whenever possible, we calibrate your thermal mass flow meter with the actual gas. When this is not possible, we use a gas or gas mixture with closely equivalent heat transfer characteristics.

Full Scale Flow Rate

Although you may not know your exact maximum flow rate (Full Scale), you must provide an estimate for the calibration. If the Full Scale is not known, it is best to over-estimate a flow. This information can be in units of mass/volume flow (SCFM, Lbs/Hr, NCMH, etc.) or velocity (SFPM, MPS, etc.).

Line Size

Whether you are interested in an inline style or an insertion style thermal mass flow meter, we need to know your process line size. This may be expressed as the nominal pipe size and schedule (ANSI, DN, etc.) of round pipes or the outside dimensions and wall thickness (or gauge) of rectangular ducts, for example.

Process Gas Temperature and Line Pressure

We calibrate your thermal mass flow meter under conditions as close to your process environment as possible, so it is important to know both the design and operational ranges of the gas temperature and the line pressure.

Electronics Temperature

This refers to the ambient temperature of the environment surrounding the flow meter’s electronics. We can provide options for a wide range of conditions.

Input Power Requirements

You must specify whether the thermal mass flow meter will be powered by 24 VDC, 115 VAC, 230 VAC. Consult factory for use with alternate power sources such as 12 VDC or solar panels.


EPI™ manufactures both Inline and Insertion style flow meters. We typically supply inline style flow meters for line sizes from 1/4″ to 4″ with a number of installation options such as MNPT ends, ANSI or DIN flanges, etc. Insertion style flow meters can be used in line sizes of 2″ or greater and can be mounted with ball valve retractor assemblies, compression fittings, pipe nipples, etc. EPI™ also manufactures flow meters with either Integral or Remote Style electronics. The integral configuration is generally less expensive, but the remote style allows easy access to the electronics even when the actual process line installation is in an otherwise inconvenient location.

Product Approvals

EPI™ flow meters have been tested and approved by a number of certifying agencies. If your application requires an agency approval, please select from the list below…read more




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Source: Indonesia Industrial Parts – Measurement, Equipment, Electrical & Control (inaparts.com)

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