Devantech Devantech SRF235 "Pencil Beam" Ultrasonic Range Finder

The Devantech SRF235 "Pencil Beam" Ultrasonic Range Finder is a small sonar with an industrial air coupled transducer, giving a very narrow 15° beam width and fast cycling - up to 100Hz update rate. Working at 235KHz, the SRF235 can be used simultaneously with standard 40KHz rangers without interference. Ranges from 10cm to 1.2m; I2C bus interface; Very narrow 15° beam width; 3-4cm Resolution ; Dimensions: 34mm x 20mm x 19mm