What type of switch does not require physical interaction to detect a target?

A proximity switch is designed to detect the presence of an object without the need for physical contact. It uses various technologies, such as electromagnetic fields or light beams, to sense when a target is nearby. This capability is particularly advantageous in situations where contacting the object could cause damage, contamination, or where the object is in motion.

In contrast, toggle switches and rocker switches require manual operation; users must physically move the switch to change its state. While solenoids can be activated without contact in some applications, they still require an electrical signal to move a mechanical device. Proximity switches, on the other hand, provide a reliable means of detection while preserving the integrity of both the switch and the target object.