Gas measurement sensor, especially for determining oxygen concentration in exhaust gases of internal combustion engines

A gas measurement sensor (10), especially for determining oxygen concentration in exhaust gases of internal combustion engines, with

• a pipe-shaped metal housing (11), which has
• means (12, 13, 14) for the sealing installation in a gas measurement line and contains in its longitudinal bore (19)
• at least one longitudinal section of an axially extending sensor (27), which has an elongated, planar shape, is electrically insulated in respect to the metal housing (11), is divided by means of a seal disposed crosswise to the longitudinal bore (19) of the metal housing (11) into
• a section (27/1) on the gas measuring side and
• a section (27/2) on the connecting side, has at least one layered, electrically conductive contact surface (36) on the end section (27/3) of its section (27/2) on the connecting side on at least one of its large areas (39), which is in electrical connection via a strip conductor (37) with
• a sensor element (38) or a layered heating element and on which an electrical contact element (46) presses, which is part of a connector plug (43), which on the connecting side is in electrical contact on the connecting side with a connecting conductor (57) of the gas measurement sensor (10) and is disposed on an electrically insulating contact element support (44), also a part of the connector plug (43), where the connector plug (43) also has an electrically insulating opposite wall (45), which is disposed on the second large area (40) of the end section (27/3) of the section (27/2) on the connecting side of the sensor (27) and cooperates with the said connecting element support (44),
• characterized in that
• the contact element support (44) and the opposite wall (45) of the connector plug (43) are two components which are at a distance from each other, located parallel to the sensor (27) and electrically insulating, which each face a large area (39, 40) of the sensor (27) with a front (48, 49), where the front (48, 49) of the contact element support (44) supports the at least one contact element (46) which rests on an associated contact surface (36) on the sensor (27), and that
• an annularly-shaped spring element (47) is provided, which surrounds in a mechanically pre-stressed manner the contact element support (44) and the opposite wall (45) of the connector plug (43) in the area of the end section (27/3), disposed in the area between them both, of the section (27/2) on the connecting side of the sensor (27), and which has an interruption (59) in the peripheral extent.