Rotameters

A reliable source for Flow Meter information and leading Flow Meter Companies & Manufacturers.

Most commonly, rotameters are used in applications with lower flow rates, and they serve as a cost-effective flow monitoring tool for both gasses and liquids in many applications. Read Moreā€¦

Rotameters A rotameter is a unique type of flowmeter which utilizes a rotating float to determine the rate of flow in a system. The float is placed in a tube through which the flowing fluid passes, and it moves up or down according to the rate at which the fluid is flowing.

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, and expert flow advice.

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Sierra Instruments $$$

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.

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HydraCheck $$$

Orangeburg, NY  |  800-866-3837

Aalborg Instruments & Controls is a globally recognized manufacturer of precision instrumentation for flow measurement and control. We offer variable area flow meters, thermal mass flow controllers, and more. Since our founding in 1972, it has been our commitment to develop, produce and deliver the highest quality products and services, as well as consistently meet or exceed customer requirements. We are ISO 9001:2015 certified.

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Aalborg Instruments & Controls, Inc. $$$

Concord, CA  |  925-687-8363

Since our founding in 1972, RCM Industries has served industries ranging from pharmaceutical to chemical to food and beverage. Our flow meters are designed to improve productivity, reduce cost, and protect the most sensitive equipment and processes. All flow meters are suitable for measuring water, oil, and most low viscosity liquids, and are available in Monel, stainless steel, and bronze alloys. No matter what your application, we aim to exceed your expectations.

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RCM Industries, Inc. $$$

Kent, WA  |  800-975-8153

SeaMetrics, a flow meter manufacturer, produces turbine flow meters, paddle wheel flowmeters, insertion flow meters, low-flow meters, water flowmeters, pulse flowmeters, flow sensors and electronic controls.

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SeaMetrics, Inc. $$$

Blythewood, SC  |  803-714-2000

Spirax Sarco is an established manufacturer of a variety of flowmeter products for liquid, gas and steam applications for a wide range of markets. Spirax Sarco is able to provide its customers with a family of products capable of measuring and controlling most liquids and gases.

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Spirax Sarco, Inc. $$$
placeholder image Sierra Instruments HydraCheck Aalborg Instruments & Controls, Inc. RCM Industries, Inc. SeaMetrics, Inc. Spirax Sarco, Inc.

This kind of flow meter is often called a variable area flow meter due to the fact that it is comprised of a slightly narrowing tube. The float moves vertically within this tube as the fluid enters through the bottom of the tube. The fluid pushes the float upward until the force of gravity on the float equalizes with the force of the fluid on the float. Once these forces come into equilibrium, the float will come to rest at a specific vertical position which corresponds to the rate of the fluid flow.

Reverse Flow Inline Flow Meter Rotameters - Hydra-Check

The vertical tube has graduations marked along its height which are used to visually read the flow rate. When the float comes to rest, the flow rate can be determined by simply finding and reading the graduation with which the float most closely aligns.

For the most part, flow readings are taken visually with rotameters, so they are often made from transparent materials such as glass, making the float visible to an operator. However, some rotameters are fitted with electronic sensors to transfer readings digitally. These rotameters do not need to be transparent and thus can be made of metal or other opaque materials.

These flow meters can also be manufactured in a multiple tube design, allowing them to measure the flow of multiple streams at the same time.

Rotameters are an excellent option for many different industrial applications due to the simplicity, versatility, and accuracy they provide. Installing and using rotameters is incredibly easy. They can be installed just about anywhere in your fluid flow system since they do not require straight pipe runs, and a flow reading can be made by simply taking a look at where the float is located in the meter.

Rotameters are also very flexible and come in a diverse range of configurations and constructions. Single tube rotameters can be used for essentially any simple flow metering application, while multiple tube rotameters are perfect for more complex applications involving more than one flowing stream. Though they are simple, rotameters still provide exceptionally accurate volumetric flow rate measurements, making them one of the top flow meters in the industry.

When purchasing a rotameter, it is important to consider several different factors and features. You should take into account which type of fluid you will be monitoring; rotameters are more frequently used with non-corrosive materials. Other factors include the number of flowing streams and whether a metering valve is needed for your applications. It is best to consult a flow meter manufacturer with these considerations and your application requirements, and they can help you find the right meter for you!

Rotameter Informational Video