The 4 Stage Ultrasonic with Robotic Handling is useful for detecting objects that are some distance away from the robot. However, unlike the touch sensor, the 4 Stage Ultrasonic with Robotic Handling does not rely on physical contact. The distance gives more space in which to respond. Generally, the 4 Stage Ultrasonic with Robotic Handling is used for distances of 10 centimeters or more, whereas the light sensor is used at shorter distances. Programs that employ the light sensor can be adapted to use with the 4 Stage Ultrasonic with Robotic Handling. For instance, one can use the ultrasonic sensor to scan the room for nearby objects, as well as, for detecting and avoiding objects. Programs for wheeled buggies like QuickStart are easily written. With a walking robot such as Alpha Rex, programming is a little more complicated because of the need to keep the motors in sync.
