Rotometer Manufacturers and Suppliers

IQS Directory provides a detailed list of rotometers manufacturers and suppliers. Find rotometers companies that can design, engineer, and manufacture rotometers to your specifications. Peruse our website to review and discover top rotometers manufacturers with roll over ads and complete product descriptions. Connect with the rotometer 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 new articles. Whether you are looking for manufacturers of roto flow meters, btu flowmeters, and rotameters 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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  • 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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  • More Rotometers Companies


Hoffer Provides Flow Solution to World-Class Scientific Institution Los Alamos Neutron Science Center

Los Alamos Neutron Science Center (LANSCE) is the major nuclear particle experimental facility at Los Alamos National Laboratory, underpinning the Laboratory as a world-class scientific institution. LANSCE pro¬vides the opportunity to perform experiments with low- to high-energy neutron sources and high-energy proton irradiations. As a desig¬nated Department of Energy national user fa¬cility, LANSCE hosts a considerable number of internal and external users, including large international collaborative research teams. Of utmost importance for many of the lab operations is the ability to provide adequate cooling capabilities given the amount of energy... Read More

Overcoming Ammonia Mass Flow Measurement & Control Challenges

Measuring or controlling ammonia flow can present challenges, and certain precautions should be taken to ensure accurate mass flow measurement and control. Sierra Instrument's Glen Coblentz shares tips on how to overcome these challenges as well as the precautions to take with ammonia mass flow measurement in this video from PITTCON.    ... Read More

businessIndustry Information

Simple and Effective Design

Rotometers are ideal for measuring the rate of liquids or gases which are being utilized for an application. Rotometers are equipped with a device called a “float” which rises and falls based upon the flow rate of the material. If the float is high then that means there is a greater force in the flow. These floats are engineered in different designs such as circular, triangular or elliptical. The float is housed in a special tube known as a tapered meeting tube. The diameter of a tapered tube gradually increases along the vertical axis of the device. Rotometers are crucial pieces of equipment when flow rate identification is essential.

Rotometers come in simple and complex designs. Some rotometers can be equipped with multiple features for checking material properties such as temperature, pressure, viscosity and more. There are many advantages and disadvantages to rotometers. One of the major advantages to rotometers is the fact that these devices have a simple design with few components which makes it easy to mass produce. Most rotometer designs require no electricity to operate which makes it ideal for applications where electricity would be a hazard or in situation where no electricity is available. The placement of the tube is very critical because gravity is a key factor for proper functionality of the rotometer. Another disadvantage of rotometers is the accuracy of the readings become less reliable at low flow rates.  Rotometers come with an excellent value in terms of repeatability and ease of use. These devices are quick to respond to any changes in the flow path. An example of a common rotometer can be found in the medical field. Medical personnel typically utilize a rotometer in oxygen regulators.


Rotometers are flow meters named for the rotating float which functions as the meter's indicating element. A float moves up and down a tapered tube according to the rate of flow. Rotometers are typically used to measure low flow rates and are an economical method of indicating and controlling gas and liquid flow for several applications.

Typically, rotometers are used to measure smaller flows and the reading is usually done locally, although transmission of the readings is possible. Most rotometers are made of glass with markings on the outside so that flow readings can be taken visually, similarly to flow indicators; however, metal rotometers are also available. Rotometers are advantageous due to the simplicity of the device and the constant pressure drop they offer. Also, rotometers do not require straight pipe runs for installation so installation can be performed almost anywhere. The selection of the appropriate rotometer for a particular application requires attention to a few key details. These include which gas will be used, the required flow rate, the number of streams to be measured and whether a metering valve is included. Rotometers are favorable for their simplicity, versatility, accuracy, and ease of use. For all these reasons, rotometers are the flow meter of choice for many industries.

Rotometers consist of a float that moves vertically through a slightly narrowing tube. As fluid enters the bottom of the rotometer, the float is forced upward until the force is balanced by gravitational forces. Like peak flow meters, graduations are marked on the tube so that the level of the float can be aligned with a gradient to provide an accurate, fast and easy-to-understand flow rate reading. Rotometer tubes are read directly in standard cubic feet per hour of air. Rather than using a constant restriction area and a variable pressure differential, rotometers use a variable restriction and a constant pressure differential to measure flow. Rotometers may be designed to measure the flow rate of single or multiple streams. Single tube rotometers are usually mounted directly on the piping and they are used with non-corrosive materials. Single tube rotometers are used if there are special conditions for the measurement or when a basic flowmeter will suffice. Multiple tube rotometers are mounted to a tripod base plate with feet to level the assembly. They may also be bench or wall mounted. This kind of rotometer takes measurements for flow rates of more than one stream of gas or liquid. Other variations are also available.

More Rotometers

Rotometers - Hoffer Flow Controls, Inc.
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Rotometer Informational Video