The invention relates to a device for temperature control in potentially explosive areas, comprising a temperature controller (10) and a housing (11) in which the temperature controller (10) is arranged, the housing (11) having a sealed opening (12) through which electrical lines (13, 14) of the temperature controller (10) are passed. It is characterized in that the temperature controller (10) has a measuring surface (15) which lies directly against an inner wall (16) of the housing (11) at least in certain areas and is electrically connected to an earthing tab (17), said earthing tab (17) being electrically connected to another line (18) which is guided through the opening (12).