Differential Pressure Sensors

The differential pressure transducer measures the pressure difference between two points. The difference between differential pressure sensors and pressure sensors is that they have two pressure interfaces. Differential pressure sensors are generally divided into positive pressure end and negative pressure. In general, the pressure of the positive pressure end of the differential pressure sensor should be greater than the pressure of the negative pressure section to measure.

How Does a Piezoresistive Differential Pressure Sensor Work?

The piezoresistive differential pressure sensor applies the two pressures to be measured to the diaphragm with piezoresistive elements on both sides. Upon sensing the pressure, the corresponding diaphragm deforms and causes a change in the resistance of the piezoresistive element. Differential pressure is measured using the change in resistance of a piezoresistive element across a curved diaphragm.

It is important to note that most differential pressure sensors are designed to measure lower differential pressures, not high differential pressures, that's why the range of differential pressure transmitters is 0~0.35 bar... 35 bar. High differential pressure measurements can be made using two independent pressure transducers and the difference is calculated. 

The differential pressure transducer or differential pressure transmitter are all differential pressure sensors. It is called differently while means the same in most situations depending on the countries and companies as differential pressure transducers are mostly used in the USA.  In Micro Sensor, we call the sensitive element a differential pressure sensor that usually outputs a millivolt signal. The differential transducers and differential pressure transmitters usually output digital signals like 4mA DC-20mA DC, Modbus, HART, etc.

In industrial environments where accuracy and reliability are non-negotiable, MICROSENSOR stands as your trusted global partner for advanced differential pressure sensing. We design and manufacture a comprehensive range of differential pressure sensors and transmitters based on proven piezoresistive technology, providing precise, stable, and dependable measurement for critical applications involving water, oil, gas, and even corrosive media. Our differential pressure measuring instruments come with international certifications, including CE, ATEX, IECEx, and DNV for use in hazardous areas and marine installations.

Contact us for custom-design services and technical guidance—ensuring optimal performance in your specific application.