What is a air flow meter used for?
Air Flow Meters are basically mass flow meters, as they determine the air velocity and air pressure by measuring the mass flow of a medium, which is air in this case. The results of measuring the air velocity can be stored in the Air Flow Meter’s memory, depending on the model.
How do air flow meters work?
Put simply, a MAF has two sensing wires. One is heated by an electrical current, the other is not. As air flows across the heated wire, it cools down. When the temperature difference between the two sensing wires changes, the MAF sensor automatically increases or decreases the current to the heated wire to compensate.
What is a flow meter and how does it work?
A flow meter works by measuring the amount of a liquid, gas, or steam flowing through or around the flow meter sensors.
What do you mean by air flow meter?
Air flow meter. An air flow meter is a device that measures air flow, i.e. how much air is flowing through a tube.
Can a hot wire air flow meter measure air pressure?
An Air Flow Meter measures air velocity as well as air pressure. Depending on the type of application, the Air Flow Meter is made as a hot-wire Air Flow Meter, a vane Air Flow Meter, a cup anemometer, a Pitot tube air flow meter or a pocket weather flow meter, all of which can measure air velocity as well as air pressure.
How does a flap type air flow meter work?
The flap-type meter includes a spring which returns the internal flap to the initial position. Sometimes if the spring is tensioned too tightly, it can restrict the incoming air and it would cause the intake air speed to increase when not opened fully.
How does an air flow meter work in a diesel engine?
In the diesel engine, the ECU meters the fuel through the injectors into the engines cylinders during the compression stroke. An air flow meter is a special sensor which has been modified now by MEMS technology.
What is the purpose of air flow meter in car?
An air flow meter is used in some automobiles to measure the quantity of air going into the internal combustion engine. All modern electronically controlled diesel engines use an air flow meter, as it is the only possible means of determining the air intake for them.
What is the air flow meter?
Air flow meter. An air flow meter is a device that measures air flow, i.e. how much air is flowing through a tube. It does not measure the volume of the air passing through the tube, it measures the mass of air flowing through the device per unit time. Thus air flow meters are simply an application of mass flow meters for a special medium.
What tool is used to measure CFM?
Measuring the cubic feet per minute (CFM) of airflow can be done with a flow meter instrument (anemometer), such as a fan type or hot-wire type, or pressure-based flow measurements.
What is the normal range for peak flow meter?
The basic structure of a Peak Flow Meter consists of a tube with a sliding indicator that moves along a scale marked in liters per minute. Generally the numbers marked on the tube range from about 60 to around 800 (Peak Flow Meters with a smaller scale range are used for pediatrics).