A Data Acquisition Unit (DAU) is a device used to collect and measure data from various sources, such as sensors and instruments. It converts physical signals, like temperature or pressure, into digital data that can be processed and analyzed. DAUs are commonly used in fields like engineering, environmental monitoring, and research. These units often include components like analog-to-digital converters and communication interfaces, allowing them to transmit data to computers or other systems. By providing accurate and timely information, a DAU helps in making informed decisions and improving processes in applications ranging from industrial automation to scientific experiments.