• IFM Electronic India Private Limited

Capacitive Proximity Switches

IFM Electronic offers Capacitive Proximity Switches. Features: resistant plastic housing for various applications; different connection options using cable, connector or terminals; and types with programmable output function available. Capacitive proximity switches are used for the non-contact detection of any objects. These Capacitive Sensors also detect non-metallic materials. Typical applications are in the wood, paper, glass, plastic, food and chemical industries. Capacitive sensors for example monitor that the contents of a cardboard box are complete or check the presence of the non-metallic caps. When detecting objects very small changes in capacitance of 0.02 pF (with a basic capacitance of the electrode of 0.2 pF) must be reliably converted into useful switched signals. This makes high requirements for the electronics as the circuit and design-related parasitic basic capacitances (e.g., conductive tracks, input capacitances of the components) can be much higher thus making a precise capacitance measurement much more difficult