Temperature sensor for a resistance thermometer, in particular for use in the exhaust gas system of combustion engines

摘要

The invention describes a temperature sensor for a resistance thermometer comprising an electric measuring resistor ( 3 ) the resistance material of which consists either of a ceramic material or of a metallic resistance material in combination with a ceramic or a mineral carrier, a protective tube ( 2 ) comprising a closed tip ( 2 b) and a rear end that provides an access to the inner space of the protective tube ( 2 ) and that contains the measuring resistor ( 3 ) closely adjacent the closed tip ( 2 b) of the protective tube ( 2 ), at least one supply line ( 5 ) that is brought out through the rear end of the protective tube ( 2 ), and an electrically insulating filler ( 6 ) based on a ceramic or a mineral material that fills the space between the protective tube ( 2 ) on the one side and the measuring resistor ( 3 ) and its at least one supply line ( 4, 5 ) on the other side. It is provided according to the invention that the packing density of the filler ( 6 ) has a gradient in lengthwise direction of the protective tube ( 2 ).