Introduce the basic points and performance parameters of pressure sensors
First, the correct installation
Usually, the damage of the high temperature melt pressure sensor is caused by the improper installation position. If the sensor is forcibly installed in an excessively small hole or an irregular hole, the vibration film of the sensor may be damaged by the impact. Choosing the right tool to machine the mounting hole is beneficial to control the size of the mounting hole. In addition, the proper mounting torque is good for forming a good seal, but if the installation torque is too high, it will easily cause the high temperature melt pressure sensor to slip off, in order to prevent this. This occurs, usually by applying a release compound to the threaded portion of the sensor prior to installation.
Second, check the size of the mounting hole
If the size of the mounting hole is not suitable, the threaded portion of the high-temperature melt pressure sensor is easily worn during the installation process, which not only affects the sealing performance of the device, but also prevents the sensor from fully functioning and may even pose a safety hazard. . Only the proper mounting holes can avoid thread wear (Thread Industry Standard 1/2-20UNF2B). Mounting holes can usually be tested with a mounting hole gauge to make the appropriate adjustments.
There are many types of pressure sensors, and their performances are also quite different. How to choose a suitable sensor is economical and reasonable.
Rated pressure range
The rated pressure range is the pressure range that meets the standard values. That is, between the highest and lowest temperatures, the sensor outputs a pressure range that meets the specified operating characteristics. In practical applications, the pressure measured by the sensor is within this range.
2. Maximum pressure range
The maximum pressure range is 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 significant reduction in the rated pressure range in order to improve linearity and temperature characteristics. Therefore, even if it is used continuously above the rated pressure, it will not be damaged. The general maximum pressure is 2-3 times the highest rated pressure.
3. Damage pressure
Damage pressure refers to the maximum pressure that can be machined on the sensor without damaging the sensor element or sensor housing.
Linearity is the maximum deviation of the linear relationship between sensor output and pressure over the operating pressure range.
5. Pressure hysteresis
The difference in sensor output when approaching a certain pressure from the minimum working pressure and the maximum working pressure at room temperature and operating pressure range.
6. Temperature range
The temperature range of the pressure sensor is divided into a compensation temperature range and an operating temperature range. The compensation temperature range is due to the application of temperature compensation, and the accuracy enters the temperature range within the rated range. The operating temperature range is the temperature range that ensures that the pressure sensor is working properly.