The working principle of ultrasonic through-beam sensors is based on the transmission of a sound wave from the transmitter to the receiver being interrupted by the object that is being detected. The transmitter generates an ultrasonic signal that is evaluated by the receiver. When the ultrasonic beam is damped or interrupted by the object being detected, the receiver output switches states.

No electrical connections are required between transmitter and receiver and the functionality of the ultrasonic through-beam sensors is also independent of the installation location. To prevent dirt particles from accumulating, however, we recommend placing the transmitter facing up when components are mounted vertically.

Product Features:

• Long detection ranges since the ultrasonic beam only travels in one direction
• Short response times
• Less subject to faults and thus very suitable for applications in difficult conditions
• Additional installation expense since both units have to be wired