Object e.g. metal bar, position detecting device, has indicator with screen that is transparent in non-indicating condition, and section of screen, which displays information and is opaque in indicating condition

摘要

The device has a detector circuit detecting an object (1) hidden behind a surface, where the object is arranged in a housing (11). A current supply and an indicator are electrically connected with the detector circuit, where the indicator comprises a screen (14) that is attached to the housing. The screen is transparent in a non-indicating condition, and a section (141) of the screen displaying information is opaque in an indicating condition.