MB1320 XL-MaxSonar-AE2
High Performance Ultrasonic Rangefinder
Features of the MB1320, XL-MaxSonar-AE2, include centimeter resolution, an excellent compromise between sensitivity and side object rejection, short to long distance detection, range information from 20cm to 765cm, a 10Hz read rate, and various output options: analog envelope, analog voltage, and RS232 serial.
This makes the MB1320 is a great choice for applications that require decreased sensitivity to side objects than the MB1310.