A differential pressure sensor is a device that measures the difference in pressure between two points. It is commonly used in industrial applications to measure the pressure of a fluid, such as air or water, in a pipe or tank. The sensor works by detecting the difference in pressure between two points and then converting that difference into an electrical signal. This signal can then be used to measure the pressure of the fluid in the pipe or tank. Differential pressure sensors are used in a variety of applications, such as controlling the flow of fluids, monitoring the pressure of a gas or liquid, and measuring the pressure of a gas or liquid in a tank. They are also used in medical applications to measure the pressure of blood in the arteries and veins. Differential pressure sensors are highly accurate and reliable, making them an essential tool for many industries.