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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. Read More…
RotometersRotometers 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.
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.
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.
As a custom flow meter manufacturer, it is our goal at RCM Industries to be your number one source for flow meters. All flow meters are suitable for measuring water, oil, and most low viscosity liquids, and are available in Monel, stainless steel, and bronze alloys. With every application, we aim to improve productivity, reduce cost, and protect the most sensitive equipment and processes.
Spire Metering Technology offers one of the broadest, most affordable lines of flow measurement and energy metering products in the industry today. Through continuous innovation, we transform complex ultrasonic technology into affordable, reliable solutions for accurate flow and energy measurement.
Thermal Instrument Company offers a wide range of thermal flow meters and flow switch products. Our products include mass flow meters, inline flow meters, insertion probes and signal processors. We serve the chemical processing, food, landfill and pharmaceutical industries.
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 - Hoffer Flow Controls, Inc.
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.