Flow sensor

Flow sensor

A flow sensor is a device for sensing the rate of fluid flow. Typically a flow sensor is the sensing element used in a flow meter, or flow logger, to record the flow of fluids.As is true for all sensors, absolute accuracy of a measurement requires a functionality for calibration.

There are various kinds of flow sensors and flow meters, including some that have a vane that is pushed by the fluid, and can drive a rotary potentiometer, or similar device.

Other flow sensors are based on sensors which measure the transfer of heat caused by the moving medium. This principle is common for microsensors to measure flow.

Flow meters are related to devices called velocimeters that measure velocity of fluids flowing through them. Laser-based interferometry is often used for air flow measurement, but for liquids, it is often easier to measure the flow. Another approach is Doppler-based methods for flow measurement. Hall effect sensors may also be used, on a flapper valve, or vane, to sense the position of the vane, as displaced by fluid flow.

ee also

* Flow measurement
* Mass flow sensor

External links

* [http://http://www.em-tec.com/index.php?topic=produkte&subtopic=messverfahren Ultrasonic Clamp-on Sensors and Vessel Transducers for flow measurement in tubing systems and blood vessels]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Mass flow sensor — A mass airflow sensor. A mass air flow sensor is used to find out the mass flowrate of air entering a fuel injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the… …   Wikipedia

  • Optical flow sensor — An optical flow sensor is a vision sensor capable of measuring optical flow or visual motion and outputting a measurement based on optical flow. Various configurations of optical flow sensors exist. One configuration is an image sensor chip… …   Wikipedia

  • Flow measurement — is the quantification of bulk fluid movement. Flow can be measured in a variety of ways. Positive displacement flow meters acumulate a fixed volume of fluid and then count the number of times the volume is filled to measure flow. Other flow… …   Wikipedia

  • Flow cytometry — Analysis of biological material by detection of the light absorbing or fluorescing properties of cells or subcellular fractions such as chromosomes passing in a narrow stream through a laser beam. Flow cytometry can be used with automated sorting …   Medical dictionary

  • MAP sensor — The examples and descriptions in this article apply strictly to four stroke cycle gasoline engines. Other engine types such as diesel, or two stroke cycle can differ in the exact implementation, but the general theme still applies. The manifold… …   Wikipedia

  • Mass flow controller — A mass flow controller A mass flow controller (MFC) is a device used to measure and control the flow of fluids and gases. A mass flow controller is designed and calibrated to control a specific type of fluid or gas at a particular range of flow… …   Wikipedia

  • Optical flow — The optic flow experienced by a rotating observer (in this case a fly). The direction and magnitude of optic flow at each location is represented by the direction and length of each arrow. Image taken from.[1] Optical flow or optic flow is the… …   Wikipedia

  • Air flow meter — Contents 1 Types of air flow meters 1.1 In automobiles 1.1.1 Failures …   Wikipedia

  • air flow meter — A meter which measures the rate at which air enters the engine. In Bosch systems, any device that measures the amount of air being used by the engine. The control unit uses this information to determine the load on the engine. The two most common …   Dictionary of automotive terms

  • AFR sensor — Articleissues cleanup=August 2008 wikify=August 2008 copyedit=August 2008 inappropriate tone=August 2008 jargon=August 2008 orphan=August 2008The AFR is a new type of Oxygen Sensor that is slowly replacing the Zirconium O2 sensor in modern… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”