Electronic switches are electrical switches that do not have mechanical contacts
, but use semiconductor devices. These switches apply electrical control signals to terminals on the switch that opens and closes the contacts. Touch plate devices, soft-touch controls and motion detector switches are frequently electronic. Some electronic safety switches mounted on food processing equipment use radio frequencies, which will interrupt the power when a safety door is opened. Electronic switches are available in a vast range of configurations such as toggle, rocker, push button, rotary, slide, and reed and relay switches.