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Clamp-On Flow Meters

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This flow meter type is popular in industries such as: food and beverage, pharmaceuticals, wastewater management and water treatment, pulp and paper, power, HVAC, and mining. Within these industries and others, they are often used to measure the flow of dirty and highly hazardous or corrosive fluids. Read More…

Clamp-On Flow Meters Clamp-on flow meters, sometimes known as non-invasive flow meters, are ultrasonic flow meters designed to measure flow without physically touching the fluid.
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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 $$$

West Valley City, UT  |  800-316-5342

Established in 1990, HydraCheck is the market leader in developing, manufacturing, and selling engineered flow meters. Well known for their modular design, high performance and superior quality, HydraCheck boasts a full line of flow meters and transmitters as well as accessories such as displays, counters and indicators to ensure every customer receives the most suitable flow meter for any application.

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HydraCheck $$$

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 $$$

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 HydraCheck SIKA USA Keyence Corporation of America Eastern Instruments

They are so useful for these types of applications because, since they do not actually come in contact with the fluids, the flow meter sensor heads are not at risk for damage like corrosion.

Instead of reading flow from inside the pipe, they read flow from the outside of the pipe, the surface to which they are clamped. There, the flow meter sensor(s) collect flow data by sending and receiving ultrasonic pulses. They send their collected data to a connected readout for interpretation. Typically, this readout device is digital, but it can also use analog outputs, relay outputs, binary + RTD inputs, or a combination of all of them.

Most often, these highly useful flow meters come in single and dual-sensor models. Single sensor meters work using piezoelectric transmit and receive crystals that are planted in just one sensor body. Customers clamp these onto a single point on the pipe surface and connect the sensor to the pipe using a coupling compound. Dual-sensor meters are built with the transmit crystal in one sensor body and the receive crystal in the other.

The main drawback of clamp-on flow meters is the fact that they do not work well with pipes that are lined, particularly linings of copper, concrete, plastic or fiberglass. This is because the lining interferes with transmit and receive signals, making the flow meter readings inaccurate.

Nevertheless, the unique, non-invasive nature of clamp-on flow meters presents a variety of benefits. First, the monitored flow remains undisturbed and without pressure drops. This allows for undistorted, more accurate readings. In addition, during installation, it is not necessary to break open your pipe system in order to insert the flow meter. Rather, you can easily install and uninstall the meter by clamping on to your pipe. This not only saves you time and money, but also makes it less likely that your system will leak or become contaminated. Also, because your meter will not be exposed to fluids, it will last longer. This is cost-effective both in the short and the long run; if you like, when you’re done with one application, you can remove your meter from the pipe and use it on another.

Clamp On Flow Meter Informational Video