The Ultrasonic Sensor UM18-217161102 is a PNP/NO/NC sensor manufactured by SICK with a 4-pin connection. It has an angular sensing range of 20 to 150mm, making it suitable for presence detection, distance measurement, or level detection applications. It is a narrow-band sensor measuring the time-of-flight of acoustic waves over short distance ranges. It features a beam angle of 10°, high sensitivity, and a short response time, enabling a fast, accurate, and reliable sensing of objects. The sensor is designed to withstand a wide range of harsh environments, making it an excellent choice for demanding applications in the industrial, automotive, and medical sectors.