Abstract: The present invention relates to an exhaust sensor (1) comprising a tubular support body (2) receiving a measurement probe (3), a first end of said probe extending beyond a first end of the tubular support body through an opening therein, and a second end of said probe being secured to an electrical connection connector (4) housed inside the tubular support body (2) and fitting closely against its walls. According to the invention, the measurement probe is sealed inside the tubular support body (2) and is thermally decoupled from the environment outside the tubular support body by means of an assembly of spacers (10, 11, 12, 13) made of ceramic and of glass, the spacers being threaded around the measurement probe and distributed inside the tubular support body between the electrical connection connector and the first end of the tubular support body so as to provide at least two separate cavities, said spacers providing leaktight sealing between the measurement probe and the tubular support body.

Abstract: The present invention relates to an exhaust sensor (1) comprising a tubular support body (2) receiving a measurement probe (3), a first end of said probe extending beyond a first end of the tubular support body through an opening therein, and a second end of said probe being secured to an electrical connection connector (4) housed inside the tubular support body (2) and fitting closely against its walls. According to the invention, the measurement probe is sealed inside the tubular support body (2) and is thermally decoupled from the environment outside the tubular support body by means of an assembly of spacers (10, 11, 12, 13) made of ceramic and of glass, the spacers being threaded around the measurement probe and distributed inside the tubular support body between the electrical connection connector and the first end of the tubular support body so as to provide at least two separate cavities, said spacers providing leaktight sealing between the measurement probe and the tubular support body.

Abstract: The invention provides a measuring device for measuring soot deposition, said device having a measuring probe (3) for measuring the quantity of soot deposited on a collection surface (2) of an elongate dielectric substrate, said probe including detection electrodes (6, 7) that are arranged in adjacent manner and that are for connecting to an electronic system that is capable of evaluating the quantity of soot deposited on the collection surface. In the invention, the device includes, for at least one detection electrode (6, 7), a measurement loop (B1) that includes said at least one detection electrode (6, 7) and that is connected to a detection system for detecting the variation in the electric resistance of said measurement loop, so as to determine the operating state of said detection electrode.