MB1300 XL-MaxSonar-AE0
High Performance Ultrasonic Rangefinder
Features of the MB1300, XL-MaxSonar-AE0, include centimeter resolution, the widest and most sensitive beam pattern of any unit from the XL-MaxSonar-AE sensor line, short to long distance detection, range information from 25cm to 765cm, a 10Hz read rate, and various output options: analog envelope, analog voltage, and RS232 serial.
This makes the MB1300 an excellent choice for use where high sensitivity, wide beam, or people detection is desired.