Pressure sensor is the most commonly used sensor in industrial practice, which is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools, pipelines and many other industries. There are many types of pressure sensors, and their performance is also quite different, how to choose the more suitable sensor, so as to achieve economic and reasonable use.
1. Rated pressure range: The rated pressure range is the pressure range that meets the specified value of the standard. That is, between the maximum and minimum temperatures, the sensor outputs a pressure range that conforms to the specified operating characteristics. In practice, the pressure measured by the sensor is within this range.
2. Maximum pressure range: The maximum pressure range refers to the maximum pressure that the sensor can withstand for a long time without causing permanent changes in output characteristics. In particular, semiconductor pressure sensors generally have a significantly reduced rated pressure range in order to improve linearity and temperature characteristics. As a result, it will not be damaged even after continuous use above the rated pressure. Generally, the maximum pressure is 2-3 times of the maximum value of the rated pressure.
3. Damage Pressure: The damage pressure is the maximum pressure that can be applied to the sensor without damaging the sensor element or sensor housing.
4. Linearity: Linearity refers to the maximum deviation of the linear relationship between the sensor output and the pressure within the working pressure range.
5. Pressure hysteresis: It is the difference between the output of the sensor when approaching a certain pressure from the minimum working pressure and the maximum working pressure at room temperature and within the working pressure range.
6. Temperature range: The temperature range of the pressure sensor is divided into compensation temperature range and working temperature range. The compensation temperature range is the temperature range within which the accuracy comes within the rated range due to the application of temperature compensation. The operating temperature range is the temperature range that ensures that the pressure sensor can work normally.
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