Patent ID: 6857826

Claim:
An injector for a powder coating installation, comprising an injector casing ( 2 ) made of electrically non-conductive material, wherein the interior surface (I) and the exterior surface (A) of the injector casing ( 2 ) are designed to be electrically conductive; the interior surface (I) and the exterior surface (A) are electrically insulated with respect to each other by interruptions (U); a means for tapping the charges from the electrically conductive interior (I) is passed out of the injector casing ( 2 ) to a measuring instrument (M) for the charge current; a ground connection ( 60 , 60 ′) is provided to establish contact between the electrically conductive exterior surface of the injector casing ( 2 ) and ground potential and wherein the exterior surface (A) is operable and adapted to provide electromagnetic shielding of the interior conductive surface.