A differential pressure transmitter is a device used to measure the difference in pressure between two points. It is typically used in industrial applications such as monitoring the pressure of liquids and gases in pipelines, tanks, and vessels. The device is also used to measure the pressure of steam and other gases in process systems. The differential pressure transmitter works by measuring the difference in pressure between two points and then converting it into an electrical signal. This signal is then sent to a control system or a display device for further analysis. Differential pressure transmitters are designed to be highly accurate and reliable, and they are used in a variety of industrial applications. They are also easy to install and maintain, making them an ideal choice for many industrial applications.