The main difference between differential pressure sensor and pressure sensor

 In modern industry and technology, sensors play an indispensable role as key devices for sensing and measuring physical quantities. Among them, differential pressure sensors have become core components in many fields such as industrial control, environmental monitoring, and medical equipment with their unique measurement capabilities and wide range of applications. What are the differences between pressure sensors and differential pressure sensors?

Measurement Principle

The pressure sensor is a sensor used to measure absolute pressure or relative pressure. It can measure the pressure applied by the medium and convert it into a corresponding electrical signal output. The working principle of the pressure sensor is usually based on piezoresistance effect, capacitance effect or piezoelectric effect. It can be widely used in liquid and gas pressure measurement, such as industrial automation, automotive engineering and environmental monitoring.

The differential pressure sensor is a sensor used to measure the differential pressure between two points. It usually consists of two pressure measuring diaphragms. The differential pressure sensor measures the pressure difference in the two pressure measuring diaphragms and converts it to obtain the electrical signal output of the pressure difference. The differential pressure sensor is often used in fields such as airflow measurement and fluid dynamic monitoring. It plays an important role in applications such as air conditioning systems, gas flow meters and wind pressure detection.

Application Scope

Secondly, the application scope of pressure sensors and differential pressure sensors is different. Pressure sensors can measure the pressure of liquids and gases, and can measure static pressure and dynamic pressure. It can be applied to various scenarios under high and low pressure conditions. The differential pressure sensor is mainly used to measure the difference in airflow, gas and liquid speed, and is often used for fluid dynamic monitoring and control, as well as flow calculation and gas flow channel regulation.

Working Mode

In addition, the working mode of pressure sensors and differential pressure sensors is also different. Pressure sensors usually convert pressure into corresponding electrical signals by connecting sensing elements (such as piezoresistors, capacitors or piezoelectric materials) to the measurement system. After amplification and processing, these electrical signals can be output to the control system or data acquisition equipment. The differential pressure sensor measures the pressure difference in the two pressure measuring chambers and converts the differential pressure into a corresponding electrical signal output according to the measurement principle.

Measurement Accuracy

Finally, there are differences in accuracy and measurement range between pressure sensors and differential pressure sensors. Pressure sensors generally have higher accuracy and larger measurement range, and can adapt to complex pressure measurement requirements in different scenarios; while differential pressure sensors usually have lower measurement range and smaller measurement error, and are suitable for scenarios with high-precision measurement of small pressure differences.

As a pressure sensor manufacturer and supplier, MicroSensor boasts over five decades of expertise in designing and producing oil-filled piezoresistive pressure sensors. Our extensive product type includes absolute, gauge, and differential pressure sensors with various diameters, ranging from 0.07 to 1000 bar (vacuum is available), and materials such as SS316L, Tantalum, Titanium, and Hastelloy C, among others. Welcome to our company for consultation and negotiation