An air pressure sensor is a tool used in many areas of mechanics and electronics to control pressure level-dependent factors. You need air pressure sensors to drive a car safely; flying an aeroplane would not be as enjoyable without altimeters controlling the machine; and the barometer in your home indicates the perceived atmospheric pressure that affects your wellbeing. Learn about air pressure sensors and their applications!
Air pressure sensors - what are they?
Air pressure sensors are broadly defined measuring devices that are based on atmospheric pressure behaviour. They are usually sensitive mechanisms that are part of larger systems that monitor air pressure changes and provide information about them. Air pressure sensors are products that are used in a wide range of fields, especially those related to technology and mechanics.
How does the air pressure sensor work?
The main function of an air pressure sensor is to record changes in the pressure level in an area or object. Depending on the type of pressure gauge, their operation is based on different mechanisms. The basis of operation is to measure the pressure and compare the results with an accepted baseline. In the case of a liquid barometer, for example, the pressure is measured by observing the flow of a liquid of a particular density; the amplitude of the height indicates the differences in pressure that arise. It is used to determine atmospheric pressure.
The altimeter, on the other hand, takes measurements using air. An air pressure sensor is programmed for the measurement (the idea is to set the correct pressure level to which the measurements will be related); the measured pressure is then introduced into a closed container with a flexible can inside. Depending on the pressure of the air pressure, the can contracts or expands, displaying the pressure level on the altimeter dial counter. Precise measurements keep the pressure level constant during the flight, which affects the comfort of the journey and is an important factor in maintaining the safety of the crew as well as the travellers.
Air pressure sensor - application
The application of air pressure sensors is very wide. Most technological processes, such as the manufacture of equipment, the joining of parts and mechanisms, are automated. In order to control the pressure of the machines and their operation, the level of pressure to be applied to the manufactured mechanisms is adjusted.
Other examples of applications include the intake air pressure sensor in engines or the TPMS system, used to control the pressure in car tyres. How do you check the air pressure level? The measurement takes place while driving and the device is mounted in the tyre. The air pressure sensor is located in each wheel - you can see from its readings that the inflation level changes when the tyres are not evenly inflated.
Depending on the type, the tyre pressure sensor measures tyre pressure differently - there are direct and indirect sensors. The former measures the tyre pressure directly while driving, separately from each wheel. There is a controller inside the car to which all the sensors are connected. When differences or changes in pressure are recorded, the system informs the driver. The intermediate sensors are based on the ABS/ESP systems - they check the rotation speed of the wheels on the same axle. If the system records a difference of more than 20%, it displays the information in the form of a signal on the dashboard.
Electronic air pressure sensors can take various forms and can be, for example, a module in a larger system in the form of a barometric sensor. This type of meter will be applicable to weathervanes, available from the small domestic appliances industry entrepreneurs Such accessories are equipped with small, specialised modules and indicate the current time, air temperature and humidity, as well as the atmospheric pressure level (via an electronic pressure sensor).
The term air pressure sensors encompasses a huge range of tools, the use of which we are often not aware of, but which are essential in the operation of vehicles, machines and everyday equipment. Not only your comfort but also your safety often depends on their operation. For this reason, remember to regularly replace your air pressure sensors and check their function - if only in your tyres.
