This ultrasonic range finder (MB1040) from Maxbotix is the narrowest beam width sensor that is also the least sensitive to side objects offered in the LV-MaxSonar-EZ sensor line.

The LV-MaxSonar-EZ4 is an excellent choice when only larger objects need to be detected.

The serial interface is a bit odd (it's RS232 instead of TTL), but the PWM and Analog interfaces will allow any micro to listen easily enough.

The sensor provides very accurate readings of 0 to 255 inches (0 to 6.45m) in 1 inch increments with little or no dead zone!

Maxbotix is offering the EZ0, EZ1, EZ2, EZ3, and EZ4 with progressively narrower beam angles allowing the sensor to match the application. Please see beam width characteristics explanation below under datasheet LV-EZ4.

Features:

• 42kHz Ultrasonic sensor
• Operates from 2.5-5.5V
• Low 2mA supply current
• 20Hz reading rate
• RS232 Serial Output - 9600bps
• Analog Output - 10mV/inch
• PWM Output - 147uS/inch
• Small, light weight module

Datasheet LV-EZ4

Maxbotix Tutorial

Note from Maxbotix

Sensor Selection Guide from Maxbotix