Selecting a Pressure Sensor on Amazon.com
A pressure sensor is used to detect and measure pressure levels in a variety of devices and applications. Some sensors have a mechanical part that moves in response to physical pressure. This part, or force collector, can be a diaphragm, piston, bourdon tube, or bellows. The sensor converts the motion generated by the force collector to an electrical signal for output to a monitoring system. Other types of sensors use changes in resonant frequency, thermal conductivity, or ionization to measure pressure. A pressure sensor may be called a differential pressure sensor and used to measure the difference between two pressure levels within a system.
One common type of pressure sensor is a pressure switch, which switches on and off in response to changes in pressure, opening or closing an electronic circuit. Pressure switches are used in heating, ventilation, and air conditioning (HVAC) equipment, pumps, industrial applications, or in traffic control applications. They can be made of brass or stainless steel. The set points vary in range and may be preset or adjustable.
A barometric pressure sensor measures changes in atmospheric pressure within a range. Barometric pressure sensors are commonly encased in weatherproof containers for protection from moisture. They may be used in weather forecasting, GPS units, and wind-farm power monitoring. Pressure sensors are designed to detect changes in altitude or depth and are commonly used in aircraft, satellites, and marine electronics.
Pressure sensing technology is incorporated in pressure transmitters to monitor industrial processes and mobile hydraulic equipment for safety and efficient operation. A handheld pressure meter also uses pressure sensing technology to conduct system diagnostic tests in HVAC installations. Touch screen devices use pressure sensors to register a user's action. Medical devices such as kidney dialysis machines, ventilators, and anesthesia machines include pressure sensors as components. In automotive applications, pressure sensors are part of electronic engine systems in vehicles for monitoring fluid pressures, tire pressure, and other aspects of engine and vehicle operation. An air pressure sensor monitors the ratio of air to fuel in an engine for optimal performance. Pressure sensor manufacturers include Honeywell.