11. Corrosion-detecting pigs use either magnetic or ultrasonic sensors . 12. The ultrasonic sensor enjoys wide popularity due to the powerful mix of low price and high functionality. 13. He also successfully connected ultrasonic sensors on a baseball cap and experienced a form of extra sensory input. 14. The stream stage sensors, mounted on bridges and culverts, use ultrasonic sensors to monitor stream and river levels. 15. The robot uses ultrasonic sensors to avoid any stationary or moving objects that might be in its way. 16. Whenever reverse gear is engaged, four ultrasonic sensors built into the rear bumper measure the available free space. 17. Directionality of the ultrasonic sensor in the bat detector can also have a large effect on detection distance. 18. In conjunction with Lego Mindstorms'NXT Ultrasonic Sensor , the robot can be trained to simultaneously sense and avoid obstacles. 19. The requirement for electronic signal processing circuitry can be used to make the ultrasonic sensor an intelligent device. 20. The probe is an ultrasonic sensor , generally known as a transducer, which functions to send and receive acoustic energy.
