WASTE GAS SENSOR WHEREIN CONTACT PARTS ARE PRESSED ONTO THE SENSOR ELEMENT BY MEANS OF A SPRING RING COMPRISING A GROOVE

摘要

The invention relates to a waste gas sensor (10) which is used to determine a physical property of a test gas, especially for determining the temperature of the test gas or the concentration of a gas component of the test gas. The gas sensor (10) comprises a sensor element (14), at least one contract surface (121) which is arranged on the sensor element (14) and one contact part (35) which is electrically connected to the contact surface (121). The contact part (35) is tensed in a non-positive fit between the contact surface (121) and at least one contact pressure body (123) which is tensed by a spring element (131) against the sensor element (14). The spring element (131) encompasses at least partially the contact pressure body (123) and comprises a groove (133).