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

US7439845B2 · kind B2 · utility

Inventors

• Hans Houben · Würselen, DE
• Robert Hartmann · Thaxton, US
• Helner Lehmann · Ludwigsburg, DE
• Werner Schnelder · Lambach, DE
• Amo Marto · Weil der Stadt, DE

Key dates

• Filing date: Jul 13, 2007
• Grant date: Oct 21, 2008
• Expiry date: Jul 13, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49082
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention describes a temperature sensor for a, resistance thermometer having an electric measuring resistor 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;having a protective tube comprising a closed tip and a rear end that provides an access to the inner space of the protective tube and that contains the measuring resistor;having at least one connection wire of the measuring resistor that is brought out through the rear end of the protective tube;and having an electrically insulating filler based on a ceramic or a mineral material that fills the space between the protective tube on the one side and the measuring resistor on the other side.It is provided according to the invention that the filler extends substantially over the length of the measuring resistor, while leaving exposed the at least one connection wire that extends from the carrier;that the at least one connection wire is connected with an inner conductor of a mineral-insulated or a ceramic-insulated metal-sheathed cable;that the metal sheath of the cable is connected with the rear end of the protective t…