An induction or inductive loop is an electromagnetic communication or detection system which uses a moving magnet or an alternating current to induce an electric current in a nearby wire. Induction loops are used for transmission and reception of communication signals, or for detection of metal objects in metal detectors or vehicle presence indicators.
A photoelectric cell consists of a transmitter and a receiver. The transmitter sends the infrared beam to the receiver. If this beam is interrupted, the photoelectric cell sends an action to an installation.
The SG 10 light curtain system consists of a self-contained transmitter detector, SGT and receiver detector, SGR, which are to be poitioned opposite of each other.
The SG 10 light curtain system consists of a self-contained transmitter detector, SGT and receiver detector, SGR, which are to be positioned opposite of each other. Both arms or wings open at the same time.