Devantech SRF235 "Pencil Beam" Ultrasonic Range Finder

• Ranges from 10cm to 1.2m
• I2C bus interface
• Very narrow 15° beam width
• 3-4cm Resolution 
• Dimensions: 34mm x 20mm x 19mm

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.