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An air flow meter is a device similar to an
An air flow meter is a device similar to an anemometer
In meteorology, an anemometer () is a device that measures wind speed and direction. It is a common instrument used in weather stations. The earliest known description of an anemometer was by Italian architect and author Leon Battista Alberti ...
that measures air flow
Airflow, or air flow, is the movement of air. Air behaves in a fluid manner, meaning particles naturally flow from areas of higher pressure to those where the pressure is lower. Atmospheric air pressure is directly related to altitude, temperatu ...
, i.e. how much air
An atmosphere () is a layer of gases that envelop an astronomical object, held in place by the gravity of the object. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A stellar atmosph ...
is flowing through a tube. It does not measure the volume
Volume is a measure of regions in three-dimensional space. It is often quantified numerically using SI derived units (such as the cubic metre and litre) or by various imperial or US customary units (such as the gallon, quart, cubic inch) ...
of the air passing through the tube, it measures the mass of air flowing through the device per unit time, though Thus air flow meters are simply an application of mass flow meter
A mass flow meter, also known as an inertial flow meter, is a device that measures mass flow rate of a fluid traveling through a tube. The mass flow rate is the mass of the fluid traveling past a fixed point per unit time.
The mass flow meter d ...
s for the medium of air
An atmosphere () is a layer of gases that envelop an astronomical object, held in place by the gravity of the object. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A stellar atmosph ...
. Typically, mass air flow measurements are expressed in the units of kilogram
The kilogram (also spelled kilogramme) is the base unit of mass in the International System of Units (SI), equal to one thousand grams. It has the unit symbol kg. The word "kilogram" is formed from the combination of the metric prefix kilo- (m ...
s per second
The second (symbol: s) is a unit of time derived from the division of the day first into 24 hours, then to 60 minutes, and finally to 60 seconds each (24 × 60 × 60 = 86400). The current and formal definition in the International System of U ...
(kg/s) or feet
The foot (: feet) is an anatomical structure found in many vertebrates. It is the terminal portion of a limb which bears weight and allows locomotion. In many animals with feet, the foot is an organ at the terminal part of the leg made up of ...
per minute
A minute is a unit of time defined as equal to 60 seconds.
It is not a unit in the International System of Units (SI), but is accepted for use with SI. The SI symbol for minutes is min (without a dot). The prime symbol is also sometimes used i ...
(fpm), which can be converted to volume measurements of cubic metres per second (cumecs) or cubic feet per minute
The cubic foot (symbol ft3 or cu ft)
, . is an
Miata.net, Repair broken Air Flow Meter, by Zach Warner, 2 January, 2009
* ttps://web.archive.org/web/20100114072836/http://autoshop101.com/forms/h34.pdf Auto shop 101, AFM sensor* Spitzer, David W. (1990), ''Industrial Flow Measurement'', {{DEFAULTSORT:Air Flow Meter Flow meters Engine fuel system technology ja:エアフロメーター
, . is an
See also
*Anemometer
In meteorology, an anemometer () is a device that measures wind speed and direction. It is a common instrument used in weather stations. The earliest known description of an anemometer was by Italian architect and author Leon Battista Alberti ...
* List of sensors
* Mass flow sensor
A mass (air) flow sensor (MAF) is a sensor used to determine the mass flow rate 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 corr ...
* :Engines
* :Engine fuel system technology
* Thermal mass flow meter
Thermal mass flow meters, also known as thermal dispersion or immersible mass flow meters, comprise a family of instruments for the measurement of the total mass flow rate of a fluid, primarily gases, flowing through closed conduits. A second ...
References
External links
Miata.net, Repair broken Air Flow Meter, by Zach Warner, 2 January, 2009
* ttps://web.archive.org/web/20100114072836/http://autoshop101.com/forms/h34.pdf Auto shop 101, AFM sensor* Spitzer, David W. (1990), ''Industrial Flow Measurement'', {{DEFAULTSORT:Air Flow Meter Flow meters Engine fuel system technology ja:エアフロメーター