The MaxSonar®-EZ4™ is one of the easiest to use ultrasonic range finders available.

The MaxSonar®-EZ4™ offers very short to long-range detection and ranging, in an incredibly small package, with ultra low power consumption. The MaxSonar®-EZ4™ detects objects from 0-inches, even objects pressing against the front sensor face, to 254-inches (6.45 meters), and provides sonar range information from 6-inches to 254 inches, with 1-inch resolution. Objects between 0-inches and 6-inches range as 6-inches.

Traditional dual-sensor piezoelectric ultrasonic range-finders have many subtle peculiarities. These include the inability to detect very close objects, a central up-close blind spot between the transducers, and very wide-angle beams (some more than 90 degrees!). In addition, if a piezoelectric sensor has a narrow beam, it will, in general, have much shorter detection zones, especially for small objects.

The MaxSonar®-EZ4™ overcomes these problems and more by utilizing a single 42KHz ultrasonic transducer coupled with a continuously variable high gain amplifier. The MaxSonar®-EZ4™ is half the size of competing sensors, while the 2mA nominal current draw is the lowest of any range sensor.

The MaxSonar®-EZ4™ is very easy to use. It has holes for easy mounting, and provides the range directly, using three user interfaces. The pulse width output is similar to other low cost ultrasonic range finders. The analog voltage output provides 10mV per inch output and always holds the latest range reading. In addition, after each range event the digital output sends asynchronous serial data in an RS232 format, except voltages are 0-5V.

To compare Maxbotix EZ series sensors performance to other ultrasonic sensors, click here.

EZ0™ Feature List

• No Dead Zone: The MaxSonar®-EZ4™ does not have a dead zone. Other ultrasonic range finders have a dead zone, some longer than 6-inches. Dead zones are problematic for many applications (such as robot mini sumo and robot wall following situations).
• Simple Calibration: The MaxSonar®-EZ4™ automaticly calibrates itself, after power up, before taking the first reading. (In normal indoor environments, no other calibration is required.)
• SMart Amplitude Range Thresholding: The MaxSonar®-EZ4™ is easier to use because small objects (clutter) outside of the central beam are ignored. The MaxSonar®-EZ4™ measures the returning range reading and makes SMART™ detection decisions. This SMART™ signal processing provides stable and accurate range readings. In addition, SMART™ signal processing controls the beam width and provides long range (over 6-meters) ranging within the central beam area, and yet rejects objects outside of this central area.
• Easy User Interface: The MaxSonar®-EZ4™ user interface was designed to be very easy and intuitive to use. The interface output formats included are pulse width output, analog voltage output, and asynchronous serial digital output. All interfaces work without user code or complicated setup strings.
• Very low price
• The lowest power
• Superior beam shape
• Stable range reading
• No central blind spot
• The smallest PCB
• Has mounting holes
• Detect objects 0-in. to 254-in. (6.45-meters)
• Range objects 6-in. to 254-in. (6.45 meters)
• Reports range directly
• Serial (0-5V) Out
• Analog Voltage Out
• Pulse Width Out
• 42KHz ultrasonic ping
• Free run operation or Triggered operation