Gas-measuring probe for determining the physical characteristic of a measuring gas

US8627706B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Bernhard Wild · Markgröningen, DE
• Rainer Maier · Tamm, DE
• Gregor Jaehnig · Rochlitz, DE
• Peter Dettling · Waiblingen, DE
• Stefan Heinzelmann · Lauffen am Neckar, DE
• Bernd Rattay · Ditzingen, DE
• Bastian Buchholz · Munich, DE
• Juergen Moratz · Bad Liebenzell, DE

Key dates

• Filing date: Mar 7, 2013
• Grant date: Jan 14, 2014
• Expiry date: Mar 7, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4077
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A gas-measuring probe for determining a physical characteristic of a measuring gas, in particular the concentration of a gas component or the temperature or pressure of the measuring gas, which includes a sensor element accommodated in a housing, at least one connection cable for the sensor element having an electrical conductor, which is enclosed by an insulation sheath and contacts the sensor element, and a cable channel sealing the housing end, which has at least one axial cable feedthrough through which the connection cable is guided out of the housing. To achieve long-lasting sealing at the cable-exit end of the housing even at higher temperatures, the insulation sheath of the connection cable is at least regionally welded to the cable wall of the cable feedthrough. To this end, a tube made of a material that fuses with the insulation sheath and the cable channel when heated is slipped over the cable section of the connection cable lying inside the cable channel.