Flow Gauge Manufacturers and Suppliers

IQS Directory provides a detailed list of flow gauge manufacturers and suppliers. Find flow gauge companies that can design, engineer, and manufacture flow gauges to your specifications. Peruse our website to review and discover top flow gauge manufacturers with roll over ads and complete product descriptions. Connect with the flow gauge companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product news articles. Whether you are looking for manufacturers of flow indicators, flow switches, or flowmeters of every type, IQS is the premier source for you.

  • Monterey, CA 831-373-0200

    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

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  • Sturtevant, WI 262-886-2695

    SIKA is a developer and manufacturer of flow control products and a wide variety of other measuring and monitoring systems. Our inventory includes flow sensors, flow meters, flow switches, and many more. We know that flow solutions aren't one-size-fits-all, which is why we provide consultation and flow management solutions that are individualized and customized to your requirements. When you choose SIKA, you will receive efficient, durable products and customer service tailored to your needs.

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  • Tucson, AZ 888-290-6060

    We are manufacturers of Internally Compensated Laminar (ICL) mass flow meters and mass flow controllers. Flow rates as low as 0.5SCCM full scale, as high as 1500SLPM full scale. Standard features: local display, 14-gas calibrations per unit, digital and analog communication, 100:1 turndown.

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  • 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.

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  • Wilmington, NC 910-392-2490

    Since 1984, Eastern Instruments has been engaged in the development of solid particle mass and airflow measuring and control systems for clients in the food, petrochemical and agricultural industries. Many of the “legend” companies use Eastern Instruments’ in-processes, making brands that touch the lives of millions every day.

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businessIndustry Information

Flow Gauges

Flow gauges can be found wherever gas or liquid flow is involved in the function of a product or system. Often used interchangeably with flow meters, flow gauges are measuring devices that people in various industries use to track the rate at which a gas or liquid flows through a system. The goal of flow gauges is to measure and relay flow rate via readable information to an operator, so that he or she can make ascertain that all is well, or make adjustments as needed. They are essential to manufacturing processes and medical, food processing, chemical, energy, automotive, marine, plumbing, heating and cooling applications and more. A few common applications for which flow gauges are used include the tracking of fuel usage, the overseeing of exact material feed values of manufacturing processes and the monitoring of medical treatments.

Generally, flow gauges are divided by the units of measurement that they use. In addition, they are primarily divided by whether they deal with mass flow or volumetric flow. To this end, manufacturers often will hear them divided into the categories of “mass flow gauges” and “volumetric flow meters.” The difference in what these two measure is fairly self-explanatory–a mass flow gauge measures the mass of the fluid passing through a system, while a volumetric flow meter measures the volume of the fluid passing through a system.

There are two principle types of mass flow gauges, or mass flow meters: coriolis flow meters, also called inertial mass flow meters, and thermal mass flow meters. Coriolis flow meters are named after the Coriolis effect, which it uses to make its mass flow measurements. The Coriolis effect, activated by vibratory forces, causes oscillations inside flow gauge tubes; the phase shift, frequency and amplitude of these oscillations are measured by sensors attached to tubes and used to calculate mass flow rates. Thermal mass meters, on the other hand, determine mass flow rates using heat transfer principles. They are made up of a heating element and one or more temperature sensors, spaced out along the length of a tube. As the fluid used in the system passes by said heating element, it picks up thermal energy, which increases its temperature. By measuring how much of the heat is dissipated, the temperature sensor or sensors offer information that can be used to calculate the system’s flow rate. The heat transfer principle used here maintains that faster moving flows have a greater cooling effect.

Examples of volumetric flow meters include turbine and ultrasonic flow meters. Turbine flow meters measure volumetric fluid flow via the use of axial turbines. This turbine is usually located at the center of of a pipeline, aligned with the pipe’s axis. When fluid passes through the pipeline, it touches the turbine and passes on some of its energy onto the turbine’s blades, causing it to spin. The speed of this spin is then measured. The fluid flow rate of the pipeline system can be calculated using a formula that expresses the relationship between the flow rate and the speed at which the turbine spins. Ultrasonic flow meters, which are available in both single and dual sensor models, use sound to determine flow rate. The basic principle with which they operate is the Doppler Effect, which refers to the shift in frequencies that occurs when an ultrasonic signal reflects the sudden stillness of bubble or particles in motion. They work by sending ultrasonic sound through a transducer into a pipe with flowing liquids. Once inside, they bounce off of the solid particles and air bubbles inside the liquid, creating a slightly different frequency that is directly proportional to the liquid flow rate. Meanwhile, a second transducer measures the frequency of the reflecting waves and reports the system, allowing the gauge to accurately measure flow rate. Unlike many flow gauges, ultrasonic flow meters can be installed outside of the tubing or piping system. They are best for use with applications that require chemical compatibility, low pressure drop and little maintenance.

Both mass and volumetric flow gauges operate using the same basic procedures and mechanisms, though they do display some differences. These differences are based on the how they measure the flow, as dictated by the application. For example, flow may be measured using pressure-based operations, mechanical operations, thermal operations or optical operations. To determine which type or types of flow gauges are best for an application, a customer must know the requirements and settings of his or her application well. This way, he or she can effectively communicate needs to a manufacturer, who can then guide the customer to the right category and type of flow gauge.

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