The UB250-F77-E2-V31 ultrasonic sensor, manufactured by Pepperl & Fuchs, is a range of 250mm, pnp/no, 4-pin sensors with a USUP range of 20-30VDC. Its features include high power output, built-in temperature compensation, and high level of environmental protection. This sensor is suitable for applications involving liquids, paper, metals, and other non-metallic surfaces. It is also suitable for areas with limited space and harsh environmental conditions. The sensor has a fast response time and easy installation, making it ideal for use in a variety of applications.