More:Adafruit
More:Infrared Sensors
LV-EZ4 ultrasonic sensor can measure distance within 0 - 6.5 meters range. PWM analog signal and serial communication at 9600 baudcan be used as output. Output signal equals to supply voltage divided by 512 for per inch (Vout = Vcc/512 per inch).
Dimensions: 15.52 mm x 22.36 mm x 20 mm, 4.23 gr