A differential pressure transmitter is a device used to measure the difference in pressure between two points in a system. It is commonly used in industrial applications to measure the pressure of liquids and gases. The device consists of two ports, one for the high-pressure side and one for the low-pressure side. The differential pressure transmitter measures the difference between the two pressures and sends a signal to a controller or display. This signal is then used to control the system or to provide a visual indication of the pressure difference. Differential pressure transmitters are used in a variety of applications, such as controlling the flow of fluids, measuring the pressure of a tank, or monitoring the pressure of a gas. They are also used in the medical field to measure the pressure of a patient’s blood. Differential pressure transmitters are an essential part of many industrial processes, as they provide a reliable and accurate way to measure pressure differences.