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Gauge pressure measurement is a subtype of differential pressure measurement. The idea is to compare pressure at any point to the current atmospheric pressure. The Gauge pressure measurement is not consistent because the atmospheric pressure varies with altitude so it cannot be used in critical measurements. Still gauge pressure sensors are used in tire pressure and blood pressure measurements.
Where to use pressure sensors?
Pressure sensor is a widely used sensor type. Like the sensor`s name tells, every device with the sensor senses pressure.
The sensor is used for converting analog signal into electrical signal. Therefore the needs of the sensor are related to electronics which needs to convert analog into electrical signal.
There are so many different targets for pressure sensors but below are the main categories:
- Touch Screen Devices: With pressure sensors you can determine how slight pressure is applied to the touch screen. Usually there is 4 different pressure sensors at the corners. By them it is given precise location of the pressure point.
- Automotive industry: Pressure sensors are widely used in cars. You may have thought how the oil and cooling pressure is calculated before blinking the oil or cooling led on the HUD. It is all about pressure sensors. At the cars there are also air bag systems which needs to quickly recognize if there is non-normal pressure coming from the edge of the cars and work if need to.
- Bio Medical: Pressure sensors are needed to optimize patient`s health and his requirements. (f.e. Blood pressure monitors)
- Aviation: Particular level of air pressure need to be in passengers lobby to provide normal breathing.
- Marine Industry: Especially on submarines it is very precise how much oxygen the crew has; pressure sensors regulate the amount.
Distributors in Finland
Because pressure sensors are used in so many things, Finland has an endless amount of vendors from small retailers to large distributors.
Sources
http://www.engineersgarage.com/articles/pressure-sensors-types-working
http://www.sensorsmag.com/sensors/pressure/fundamentals-pressure-sensor-technology-846
Group members: Kiia Tammi, Mikko Heiskanen and Aleksi Väisänen
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