Limit switch

Limit switch is an electrical device used in control systems as a sensor that generates a signal when a certain event occurs, usually mechanical contact of a pair of mobile mechanisms. Structurally, the switches consist of two separate elements - a sensor reed switch, made on the basis of a switching reed switch, and a control element, made on the basis of a permanent magnet. Switches operate on the principle of interaction between reed switches and a magnetic field Control elements without mechanical influence on each other. Also used are non-contact limit switches, which consist of an infrared LED and a photoresistor located opposite each other.