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Venturi Flow Meters

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Like many other flow meters, venturi meters use a differential pressure measurement to determine the flow rate of a fluid in a system, which means they are relatively easy to use and operate. For this reason, venturi meters are used for many industrial and commercial purposes. Read More…

Venturi Flow Meters Venturi flow meters, or simply venturi meters, are devices used to measure the flow rate of a variety of fluids in many different applications. This type of flowmeter is commonly used in plumbing applications and applications involving flowing water, propane, and oil. However, venturi meters can be used to measure the flow rate of gaseous fluids as well.
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Leading Manufacturers

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 www.sierrainstruments.com.

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Sierra Instruments $$$

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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SIKA USA $$$

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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Alicat Scientific, Inc. $$$

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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Keyence Corporation of America $$$

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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Eastern Instruments $$$
placeholder image Sierra Instruments SIKA USA Alicat Scientific, Inc. Keyence Corporation of America Eastern Instruments

These meters, as their name suggests, operate based on the Venturi effect, which is a phenomenon that occurs when a fluid's pressure is reduced while flowing through a constricted pipe. The flow meter is made up of several components, the most important of which is a venturi tube. This unique tube is made up of an entry cone, a small diameter tube, and an exit cone.

The tube is placed within a pipeline system and causes the diameter of the pipeline to gradually decrease down to the diameter of the small tube as the fluid passes through the entry cone. The fluid then flows out of the small tube and into the exit cone which slowly returns the pipeline back to its original diameter. This unique design generates the Venturi effect.

The flow meter is also comprised of two pressure measurement devices, one located before the constricted pipe and the other located within the small diameter connecting tube in the venturi tube. The venturi tube creates a pressure differential between these two points, which can be measured by the two pressure sensors. Using a complex formula, the flow meter can determine the volumetric flow rate of the fluid in the system. This formula depends on whether the fluid is compressible and the radius of the pipeline. Other important factors include fluid viscosity and the conical angle of the venturi tube entry and exit cones.

Venturi flow meters are well known for their reliability, long-term performance, and versatility, making them an excellent option for just about any standard metering application. Their reliability and longevity can be attributed to their relatively simple design and lack of moving parts. This allows the device to run very efficiently and significantly reduces the need for regular maintenance.

Compared to many other meters, venturi flow meters also provide exceptionally accurate measurements, and this type of flow meter is often used as the primary standard for flow calibration. While they do provide many benefits, these meters are still limited due to the loss of energy when the fluid travels through the reduced diameter of the venturi tube. However, the conical exit of the venturi meter helps recover much of the consumed energy, making the venturi flow meter an extremely effective and reliable flow metering option.,/p.

Venturi Flow Meter Informational Video