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 HVAC systems, process control, and fluid dynamics. The device works by measuring the difference in pressure between two points and then converting that pressure into an electrical signal. This signal is then used to control the system or to provide feedback to the user. Differential pressure transmitters are designed to be accurate and reliable, making them a popular choice for industrial applications. They are also relatively easy to install and maintain, making them a cost-effective solution for many applications. Differential pressure transmitters are available in a variety of sizes and configurations, making them suitable for a wide range of applications. They are also capable of measuring both positive and negative pressure, making them a versatile tool for measuring a variety of pressures.