Pressure sensors are an indispensable part of modern electronics. It is widely used in various fields, such as aviation, automotive, medical, chemical, etc. This article will introduce you to some common pressure sensor models and their parameters.
Part I: Metal-thin film pressure sensors.
Metal-thin film pressure sensors are a commonly used type of sensor. It usually consists of a metal film sensitive element, a support structure, and a cable. A change in the pressure of a metallic thin film sensitive element causes a change in the resistance value, which can be detected by the circuit and converted into the desired signal output. Its main parameters include:
1.Measurement range: typically from a few hundred pascals to hundreds of megapascals.
2.Sensitivity: typically 1-3mV v10mpa。
3.Nonlinearity: The maximum nonlinearity is 1%.
4.Repeatability: The repeatability error shall not exceed 01%。
Part II: Semiconductor Pressure Sensors
Semiconductor pressure sensors consist of varistors or varistors and are also very common types of pressure sensors. They are mainly classified according to the form of change of the signal, such as capacitive, resistive, voltage output, etc. The main parameters about this type of sensor include:
1.Measurement range: This type of sensor typically has a measurement range of tens of kilopascals to hundreds of megapascals.
2.Sensitivity: Its sensitivity is typically 1-5mV V10mpa。
3.Nonlinearity: Its maximum nonlinearity is 02%。
4.Repeatability: The repeatability error shall not exceed 005%。
Part III: Piezoelectric Pressure Sensors.
Piezoelectric sensors can be used in demanding applications in high-voltage and high-temperature environments. It is made of a material containing piezoelectric ceramics or crystals, and when pressure is applied, its potential changes accordingly. The main parameters of this type of sensor include:
1.Measurement range: Piezoelectric pressure sensors typically have a measurement range of hundreds of pascals to hundreds of megapascals.
2.Sensitivity: Its sensitivity is typically 1mv v10mpa。
3.Nonlinearity: Its maximum nonlinearity is 01%。
4.Repeatability: The repeatability error shall not exceed 01%。
Summary. In this article, we present three pressure sensor models and their parameters, which include metal-thin film sensors, semiconductor sensors, and piezoelectric sensors. Understanding these types and their parameters will help in the selection and correct use of the relevant pressure sensors, thereby improving the accuracy and efficiency of the application. Coppray sensors