An apparatus for measuring the state of a measurement target, in particular from oils or fats

Device (1) for measuring the state of a measurement target, in particular from oils or fats, comprising a housing (3), an attached hollow connection element (10) and an opposite end of the connecting element (10) attached to the carrier (14) for receiving a sensor (16) for measuring an electrical characteristic of the measurement target, wherein the carrier (14) has a front side (14a), one of the front side opposing rear side (14b) and four side surfaces (14c), wherein the sensor (14) on the front side ( 14a) of the carrier (14) and (at least one electrical line 12) is connected to an electronic evaluation unit in connection is arranged which faces in the region of the housing (3) and / or of the housing (3) end of the connecting element (10) is, wherein the carrier (14) in an at least the back side (14b) and the side surfaces (14c) covering protective housing (20) and the sensor (16) through a front opening (21) in the is accessible protective housing (20), characterized in that the carrier (14) a shield (26) is arranged on the rear side (14b) and that the shield (26) to the ground or an active signal is electrically conductively connected.