Working Principles of Ceramic Pressure Sensors
There are two main working principles of ceramic pressure sensors: the piezoelectric effect and the capacitive effect.
- Piezoelectric effect:
The piezoelectric effect refers to the fact that some materials generate an electric charge when subjected to mechanical stress. These materials are called piezoelectric materials. Ceramic is a common piezoelectric material. When pressure acts on a ceramic sensor, the ceramic material inside the sensor deforms slightly, resulting in a redistribution of charge. By detecting these charge changes, the pressure applied by the outside world can be accurately measured. This type of sensor has the characteristics of fast response and high sensitivity.
- Capacitive effect
Ceramic pressure sensors based on the capacitance effect principle use the dielectric properties of ceramic materials to measure pressure. The sensor is usually composed of a fixed electrode and a movable electrode, and a capacitor is formed between the two. When external pressure acts on the movable electrode, the distance between the electrodes changes, thereby changing the capacitance value. By detecting the change in capacitance value, the applied pressure can be calculated. This type of sensor has a simple structure and has high accuracy and stability.
Ceramic Pressure Sensor VS. Stainless Steel Pressure Sensor
| Ceramic Pressure Sensor | Stainless Steel Pressure Sensor | |
| Medium Temperature | -20-125°C | -20-85℃ |
| Overall Accuracy | 0.5%FS | 0.1FS% |
| Measuring Range | 0-0.2MPa-……-40MPa | 0-0.2MPa-……-60MPa （Customized: high pressure up to 700MPa） |
| Corrosion resistance | High temperature, strong acid, strong alkali | Corrosion resistance in acid, alkali and salt media |
Ordering Guide for Universal Ceramic Pressure Transmitter
- Pay attention to the compatibility between the measured medium and the contact part of the product when selecting.
- If you choose other items, you need to indicate the specific requirements.
- If you have special requirements for the performance parameters and functions of the products, please negotiate with our company.
- Please pay attention to the wiring definition of the cable. Do not connect it in reverse or incorrectly, otherwise the product will fail. The damage caused by wiring shall be borne by the user.
