Pressure sensor is the most commonly used in industrial practice, a sensor, pressure sensors are widely used in a variety of industrial automation environment, involving water conservancy and hydropower, railroad transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, electric power, ships, machine tools, pipelines, and many other industries, today we will work together to understand the principle of operation of several commonly used pressure sensors. Piezoresistive pressure sensor working principle: Piezoresistive pressure sensor is a silicon chip as an elastic sensitive element, any of the diaphragm with integrated circuit diffusion process made of equivalent conductor resistance, composed of Wheatstone bridge, when the diaphragm is stressed, due to the semiconductor resistive effect, the resistance value changes, so that the output of the bridge and measured changes in pressure. Piezoresistive pressure sensor has a simple and compact structure, high sensitivity, high accuracy, wide measurement range and so on. Working principle of piezoelectric pressure sensor: Piezoelectric pressure sensor is mainly based on the piezoelectric effect, the use of electrical components and other machinery to be measured pressure is converted into electricity, and then carry out the relevant measurement work of measuring precision instruments. Piezoelectric pressure sensors can adapt to harsh environments, high self-oscillation frequency, the use and maintenance of more demanding and other characteristics. The working principle of capacitive pressure sensor: Capacitive pressure sensor is a use of capacitance as a sensitive element, the measured pressure will be converted to capacitance value change of the pressure sensor. This pressure sensor is generally used round metal film or metalized film as a capacitor electrode, when the film feels the pressure and deformation, the film and the fixed electrode between the formation of the capacitance changes through the measurement circuit can be output and the voltage into a certain relationship between the electrical signal. Capacitive pressure sensor belongs to the pole distance change type capacitive sensor, can be divided into single capacitive pressure sensor and differential capacitive pressure sensor. Capacitive pressure sensors are characterized by good linearity and high sensitivity. The working principle of inductive pressure sensor: The working principle of inductive pressure sensor is due to the magnetic material and permeability is different, when the pressure acts on the diaphragm, the size of the air gap changes, the change of the air gap affects the change of the coil inductance, the processing circuit can be converted into this inductance change into the corresponding signal output, so as to achieve the purpose of measuring pressure. The advantages of inductive pressure sensors lie in the high sensitivity, large measuring range; the disadvantage is that it can not be applied to high-frequency dynamic environment. Star Instrument Sensor Manufacturing Co., Ltd. is a collection of research and development, production, sales as one of the high-tech enterprises. Specializing in the production of pressure transmitters, level transmitters, temperature transmitters, temperature and humidity transmitters, differential pressure transmitters, soil moisture transmitters, 3051 transmitters and related instrumentation accessories. Many products under the brand of Star Instruments have obtained a number of patents issued by the state, such as CE certification, IS9001 certification, SGS certification, TüV SüD certification, explosion-proof certification and so on. For product consultation, product customization, agency, technical inquiries, quotes, etc., please contact Star Instruments: 400-600-4496 !