The MaxSonar-EZ0 is a very tight-packaged, high-sensitivity single-element sonar module. Much like the very popular EZ1 module, the EZ0 offers higher sensitivity and slightly different coverage pattern
The MaxSonar-EZ0 is very similar to the very popular EZ1 , which is one of the smallest, most efficient, sonar (ultrasonic) ranging systems available. The MaxSonar-EZ0 offers higher sensitivity and therefore a greater coverage pattern making it much more sensitive to smaller objects. It has a detection range of over 5' seeing a 1/8" diameter rod! The general detection specification is up to 254-inches (6.45 meters / 21.1 ft.), reporting back in 1" increments!
The interface output formats included are pulse width output, analog voltage output, and serial output (TTL).
For further comparisons between the various sonar sensors MaxBotix has, check out their comparison chart.