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Positive Displacement Flow Meter Manufacturers and Suppliers

IQS Directory is a top industrial directory listing of leading industrial positive displacement flow meter manufacturers and suppliers. Access our comprehensive index to review and source positive displacement flow meter manufacturers with preview ads and detailed product descriptions. These positive displacement flow meter companies can design, engineer and manufacture positive displacement flow meters to your specifications and application need. A quick and easy to use request for quote form is provided for you to contact these positive displacement flow meter manufacturers and suppliers. Each company has detailed profile information, locations, phone number, website links, product videos and product information defined. Read customer reviews and product specific news articles. We are the right resource for your information requirement whether its for a manufacturer of positive displacement flow meters, diesel fuel flow meters, fuel flow meter for boats.

  • Monterey, CA 800-866-0200

    Sierra manufacturers high performance mass flow meters and controllers for nearly any gas, liquid or steam. Customers choose Sierra when they need an accurate and repeatable flow measurement, short delivery lead times, expert flow advice and long term support. When it matters, choose Sierra. Visit www.sierrainstruments.com.

  • West Valley City, UT 800-316-5342

    HydraCheck offers everything needed to service, maintain and troubleshoot hydraulic systems at prices you can afford. We manufacture and distribute diagnostic test kits, flow meters, pressure gauges, tachometers, etc. Our inline flow meters monitor pump performance and media flows in hydraulic systems.

  • Chatsworth, CA 800-356-6387

    Flowmetrics provides a variety of flow meter products including in-line, insertion, turbine and variable area flow meters plus rotameters. We also have signal conditioners and convertors; magnetic pickups; field indicators and batch controllers. Contact us today for all of your flow meter needs!

  • Roselle, NJ 800-899-0553

    Assured Automation supplies economical durable, compact, high precision digital fluid flow meters through its Quick-Ship program for fast delivery. Its industrial flow meters measure both rate and totals for liquids, including water, fuel, LPG and caustics. A wide variety of flow meters are available, providing cost-effective solutions for each industrial application.

  • Itasca, IL 888-539-3623

    Keyence is a leading supplier of flow meters and many other automation components. Our flow meters are compatible with everything from compressors to receiving tanks to machine drop points, while measuring both overall usage and costly leakage amounts. Additional features include multiple numerical and graphical data displays. Visit our website to find out more about our products.

  • More Positive Displacement Flow Meter Companies

businessIndustry Information

Positive Displacement Flow Meter

Positive displacement flow meters measure fluid, usually liquid, flow when the flow mechanically displaces components placed in the fluid. 

Within positive displacement flow meters are chambers through which fluid flows. These chambers contain a variety of mechanical components that help separate liquid or gas media into fixed, metered volumes. One such component is the rotating or reciprocating mechanism, which allows free flow only when it rotates a certain way. All components are rotated and shifted, or displaced, by the flow of liquid. The rate at which the rotating mechanism turns is directly proportional to the flow rate of the fluid. These features set positive displacement flow meters apart from other flow meters. 

In order to gauge flow rate, positive displacement flow meters measure displacement. To do so, they accumulate a fixed volume of fluid, and then keep track of the number of times the volume is filled. One way to think about this is with the following analogy: A woman fills a bucket of water and then quickly grabs another bucket. She fills this bucket to the same line as the first bucket. As she does so, she times the rate at which the second bucket fills. Then, she uses the information to determine flow rate. (Assume that appropriate pressure and temperature compensations are met.)

There are two main types of positive displacement flow meters, sensor-only flow meters and transducer flow meters: 

Sensor-only systems: provide integrated user interface display

Transducer systems: provide electronic outputs for controllers, processors and data acquisition systems

Both types of positive displacement flow meter are highly accurate and can be used with dirty, corrosive, or very viscous fluids. They can also be used to measure the volumetric flow rate of gases. They are popular for use in applications from injection molding, to hydraulic testing, among other precision applications.

Each type of flow meter system has important specifications that you need to note while shopping for them. These include: temperature range, connection size, minimum and maximum measurable flow rate, percent accuracy (usually shown as a percentage of actual reading, not the full scale), operating pressure, and maximum permissible material viscosity.

For the best results, it’s important that you connect with an experienced flow meter manufacturer that can guide your selection process. If you’re interested, such a manufacturer can likely also design you a custom flow meter system. To learn more, check out the manufacturers we have listed on this page. 


HydraCheck1 HydraCheck2
Flow Meters – HydraCheck
Flow Meters – HydraCheck