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Gas flow switches and liquid flow switches, velocity, are devices used for measuring the flow or quantity of a moving fluid in terms of velocity, such as feet per minute. These may be plain sensors or sensor systems with displays and computer outputs. The most important specifications for velocity style gas flow switches and liquid flow switches are the flow rate to be measured and whether liquids or gases will be the measured fluids. Also important are operating pressure of the fluid line, the fluid temperature and accuracy. The technologies for velocity gas flow switches and liquid flow switches vary widely.

The most common types are inferential flow measurement, positive displacement, velocity meters, and true mass flow meters. Inferential measurement refers to the indirect measurement of flow by directly measuring another value and inferring the flow based on well-known relationships between the directly measured value and flow. The use of differential pressure as an inferred measurement of a liquid's rate of flow is the most common type of unit in use today. Examples of differential pressure meters include orifice plates, Venturi tubes, flow nozzles, cone types, Pitot tubes, target meters, elbow tap meters and rotameters. 


Products & Services Related to Velocity Flow Switches
Gas Flow Meters
Gas flow meters are used for measuring the flow or quantity of a moving gas in an enclosed pipe or passage.
Gas Flow Switches, Volumetric
Volumetric gas flow switches are devices with a switch output used for measuring the flow or quantity of a moving gas in terms of a unit of volume per unit time, such as cubic feet per minute.
Liquid Flow Meters
Liquid flow meters are used for measuring the flow or quantity of a moving fluid.
Liquid Flow Switches, Volumetric
Volumetric liquid flow switches are devices with a switch output used for measuring the flow or quantity of a moving fluid in terms of a unit of volume per unit time, such as liters per minute. 
Mass Flow Meters and Controllers
A mass flow meter is a device that consist of a mass flow sensor or transducer and signal processing electronics.  Fluid (liquid or gas) flow is measured in mass rate units (lbs/min).
Mass Flow Switches
Mass liquid flow switches and mass gas flow switches are devices used for measuring the flow or quantity of a moving liquid or gas in terms of a unit of mass per unit time, such as pounds per minute. These devices may be sensors with electrical output or may be stand-alone instruments with local displays and controls.
Ultrasonic Flow Meters
Ultrasonic flow meters use sound frequencies to determine flow rates. They do not work well with liquids with suspended solids or air gaps.

Other Topics You Might Be Interested In
True mass flow meters directly measure the mass rate of flow. They include thermal meters and Coriolis meters. Thermal meters use a heated sensing element isolated from the medium flow path. The flow... (Read More)
Positive displacement flow meters are used to take direct measurements of liquid flow. They divide the liquid into specific increments which are moved on. The total flow is an accumulation of the... (Read More)
Velocity meters operate linearly with respect to the volume flow rate. Because there is no square-root relationship (as with differential pressure devices), their range ability is greater. Examples of... (Read More)

Engineering Web: Velocity Flow Switches
Pages: 1 - 5 of 256586
Air Velocity Measurement
... switches, transmitters, flowmeters, flow-switches, pitot tubes, anemometers, air velocity instruments, Level-Switches, temperature-controllers, thermocouples, RTD's, and valves ...
See Dwyer Instruments Inc. Profile & Catalog
New high velocity flow switch for liquids or gases: News from Fluid Components ...
IEC Approval for FCI thermal mass flow switches. Designed for precision flow switching and flow measurement in rugged industrial applications, FCI thermal mass flow switches and flowmeters have ...
Air Veloicity Introduction
... switches, transmitters, flowmeters, flow-switches, pitot tubes, anemometers, air velocity instruments, Level-Switches, temperature-controllers, thermocouples, RTD's, and valves ...
See Dwyer Instruments Inc. Profile & Catalog
Flow Switch, Flow Switches
... switches feature thermal dispersion technology in which the temperature difference is greatest in a no-flow condition and decreases as flow increases, cooling the heated RTD. Changes in flow velocity ...
See Fluid Components Intl. (FCI) Profile & Catalog
Industrial Flow Switches
The FSW-31A and FSW-32A Flow Switches are sensitive and fast. Figure 1:. Wiring Schematic for power applied to load when flow is. acting. They respond to pipe system steady state flow and also to ...
See OMEGA Engineering, Inc. Information

Part Numbers for Velocity Flow Switches

Part # Distributor Manufacturer Product Category Description
AF2 Omni Controls, Inc. ITT Industries, Inc. / McDonnell & Miller Air Velocity Flow Sensors Low velocity applications, time delay relay, brass, steel, aluminum
AF1 Omni Controls, Inc. ITT Industries, Inc. / McDonnell & Miller Air Velocity Flow Sensors General purpose applications, medium and high velocity requirements
Vent-Captor Series   Flow Line Options Corp. Velocity Flow Switches Self contained, adjustable set point, simple installation
AF3 Omni Controls, Inc. ITT Industries, Inc. / McDonnell & Miller Air Velocity Flow Sensors General purpose applications, low velocity, economical flow switch
CF 12 AC   SITRON Velocity Flow Switches Thermal dispersion flow switch monitor, 316 stainless steel construction

More >>
See more product announcements for Velocity Flow Switches
Peeco Flow Switches

Peeco Flow Switches
Lamons Gasket Company


Gas and Liquid Flow Switch: Sitron CF Series

Gas and Liquid Flow Switch: Sitron CF Series
SITRON


Thermal Dispersion Flow Switch

Thermal Dispersion Flow Switch
SITRON


11 See more product announcements for Velocity Flow Switches

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