An Introduction of Ceramic Pressure Sensor

At present, there are two main types of pressure sensors in the market, one is the diffusion Silicon Pressure Sensor, and the other is the well-known Ceramic pressure sensor. In this issue, we will first to learn the Ceramic Pressure Sensor.

Basic characteristics of ceramics

Ceramic is a recognized material with high elasticity, corrosion resistance, wear resistance, shock and vibration resistance, and low cost. It is the mainstream development direction of pressure sensor materials.

How Ceramic Pressure Sensors Work

The ceramic Pressure Sensor has no liquid transmission. The pressure directly acts on the front surface of the ceramic diaphragm, causing the diaphragm to deform slightly. The back of the ceramic diaphragm is printed with a thick film resistor, which is connected to a Wheatstone bridge. Due to the varistor effect, the bridge is Generates an electrical signal proportional to pressure. According to the core, the Ceramic Pressure Transmitter can be divided into two categories: ceramic piezoresistive and ceramic capacitive.

So why do we choose ceramic pressure sensors?

Abrasion resistant

Ceramics are inherently wear-resistant, and the material is compact, making the ceramic diaphragm 10 times harder than stainless steel. This lightness is advantageous, and it allows the ceramics to withstand harsh environments, including mud, mining and paper production.

Corrosion Resistance

Two main options are available for measurement applications in highly corrosive processes: special materials, which are often very expensive, or ceramics.Measuring cells made of ceramic resist interaction with the process media very reliably.In contrast to metallic measuring cells, they exhibit significantly increased chemical resistance to many aggressive liquids and gases.So they are therefore compatible with the majority of process media,from salt water to highly acidic liquids.

Wide operating temperature range

Ceramic high temperature resistance are related with material characteristics , ceramic itself with metal powder and ceramic raw materials sintered materials, sintering temperature is relatively high, so ceramic materials are high temperature resistance.

Small size, highly cost-effective

The ceramic core is relatively small in structure as a whole, and the pressure sensor designed is also relatively small. Because of its wide application and low cost of mass production, it is liked by customers at home and abroad.