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    • 3. 发明公开
    • NÄHERUNGSSCHALTER
    • 探测器
    • EP2240949A2
    • 2010-10-20
    • EP09705113.0
    • 2009-01-30
    • Pepperl + Fuchs GmbH
    • SCHOEN, Dierk
    • H01H13/02
    • H03K17/945G01D11/245
    • The invention relates to a proximity switch for detecting objects, comprising a housing sleeve with a transducer unit that is situated on one measuring end of the housing sleeve and has a receptacle containing a transducer element for detecting a physical measured variable and comprising a connecting piece located on one connecting end of the housing sleeve. The switch also comprises an electronic assembly that is held in the housing sleeve and is located on a printed circuit board and a control and evaluation unit, designed to control the transducer element, to evaluate signals that have been measured by the transducer element and to emit switching signals to the exterior. The measuring end and connecting end of the printed circuit board hold light-emitting diodes of different colours for indicating operating and/or switching states, the transducer receptacle having a transparent region running around a housing axis and/or a transparent region on the end face. The proximity switch is characterised in that the connecting piece has a transparent region running around said piece, the transparent regions on the measuring end and connecting end are optically uniform, each transparent region comprising the light-emitting diodes can be illuminated with one colour and the control and evaluation unit is designed to control different coloured light-emitting diodes for indicating different operating and/or switching states.