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What is a pressure sensor?
In work and life, pressure is everywhere, so pressure sensors have naturally become the most commonly used sensors in industrial practice, widely used in various industrial automatic control environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, petrochemical, oil wells, electricity, ships, machine tools, pipelines and many other industries
While discussing pressure sensors, we must also understand the concept of pressure transmitters
Pressure sensors typically refer to sensitive components that convert changing pressure signals into corresponding changing resistance or capacitance signals, such as piezoresistive and piezoelectric capacitive components
Usually, sensors consist of two parts, namely sensitive components and conversion components. Among them, sensitive components refer to the parts of the sensor that can directly sense or respond to the tested object; The conversion element refers to a part of a sensor that converts the measured strain sensed or responded by the sensitive element into an electrical signal suitable for transmission or measurement
Pressure transmitters generally refer to a complete set of circuit units that measure pressure, consisting of pressure sensitive components and conditioning circuits. They can generally directly output standard voltage or current signals that are linearly related to pressure, for direct collection by instruments, PLCs, acquisition cards, and other devices
Because the output signal of the sensor is generally weak, modulation and amplification are required. With the development of integrated technology, people have also placed this part of the circuit and power supply circuit together in sensors. In this way, the sensor can output useful signals that are easy to process and transmit. In the past, when technology was relatively backward, the so-called sensor referred to the sensitive component mentioned in the above article, while the transmitter was the conversion component mentioned in the above article
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