Introduction of Ceramic Piezoresistive Pressure Sensors
Dry Ceramic Piezoresistive Pressure Sensors

The ceramic piezoresistive pressure sensor is a dry ceramic piezoresistive pressure sensor refined by a special process using ceramic materials. Ceramic is a recognized material with high elasticity, corrosion resistance, wear resistance, shock resistance and vibration resistance.

Chinese name:陶瓷压阻压力传感器

English name : ceramic piezoresistive pressure sensor
Measuring range: 2～600Bar

Introduction
The pressure transmitter is a dry ceramic piezoresistive pressure sensor refined by a special process using ceramic materials. Ceramic is a recognized material with high elasticity, corrosion resistance, wear resistance, shock resistance and vibration resistance. The thermal stability characteristics of ceramics and its thick film resistance can make its working temperature range as high as -40 ~ 135 ℃, and it has high precision and high stability of measurement. The degree of electrical insulation is >2kV, the output signal is strong, and the long-term stability is good. Ceramic sensors with high characteristics and low price will be the development direction of pressure sensors. In Europe and the United States, there is a trend to completely replace other types of sensors. In China, more and more users use ceramic sensors to replace diffused silicon pressure sensors.
Dry ceramic pressure sensors are widely used in: process control, environmental control, hydraulic and pneumatic equipment, servo valves and transmissions, chemicals and chemical industries and medical instrumentation and many other fields. It has a small size, a diameter of 18mm, a range of 2 to 600bar, and a low price. It is widely used in various pressure measurement occasions.

The CPS18 series ceramic pressure sensor core produced by Huaxinlian Technology adopts refined alumina (AL2O3) ceramic base, combined with high-stability sensitive materials, and is refined through silk screen printing, high temperature sintering, laser resistance adjustment and other processes. pressure sensitive element.

The external dimension of CPS18 series is Φ18mm*6.35mm. Its unique circuit design greatly improves the reliability of the product, and the temperature compensation circuit is integrated in the internal circuit of the sensitive element. (-20℃-85℃), the temperature drift signal of the internal bridge is close to zero (≤±0.02%FS/℃), which can greatly reduce the temperature compensation calibration work required in the production of pressure sensors*.

Ceramics have good thermal stability and creep resistance. Its working temperature range is as high as -40 ~ 150 ℃, and it has good long-term stability.

The corrosion resistance of ceramics makes it unique in the fields of refrigeration, chemical industry, medicine and environmental protection, and gradually replaces conventional pressure sensors such as diffused silicon.

The temperature-compensated ceramic piezoresistive sensor core is the first choice for pressure sensing components in IoT(internet of things)  applications due to its high cost performance. It is widely used in pressure measurement of air, water, oil and other media, in automobiles, air compressors, fire It has a wide range of applications in water pipes, industry, home appliances and other fields. Our company can customize pressure sensitive cores of various shapes and sizes according to customer needs.

二、Feature 

●Ceramic base with high elastic modulus

●Zero and full scale laser calibration

●Excellent corrosion and wear resistance

●Anti-shock, anti-vibration, wide operating temperature range

●High sensitivity, high precision, high stability

●Internal active temperature compensation, extremely low temperature drift coefficient .

●Small size, easy to package

●Patented circuit and graphic design

Measuring range: 0.2～60Mpa (can be customized)
Working voltage: 2～20V
Sensitivity: 2-4mv/V, typical value 3.0mv/V
Zero output: 0±0.5 mv/5V  Typical value  0±0.2mv/5V(25℃)
Bridge impedance: 11KΩ±30%
Nonlinearity, Hysteresis, Repeatability: <=0.15%FS   Typical value   0.1%FS
range of working temperature: ﹣40℃-135℃
Temperature Coefficient: <=0.02%FS℃（*Temperature Compensation type）

Response time: ＜1ms

Safe overload (overvoltage allowed): 2.5 times the rated range (nominal range)
stability: Better than ±0.15%FS/year (under reasonable use)
Service life: More than 2 million range pressure cycles