rero Ultrasonic Sensor is an ultrasonic ranging module which measure distance from the obstacle in front of the sensor. rero Ultrasonic Sensor measure distance from at least 5cm up to 200cm. It detects obstacle down to 0cm but the distance reading may be not true.
User can test rero Ultrasonic sensor using the rero Controller ‘Sensors’ menu. The distance is displayed as scrolling bar with numeric value of distance from the object in front of the sensor. Larger area is needed for the echoing of ultrasonic sound especially if the object is at distance more than 30cm