SENSOR

摘要

The invention relates to a sensor, in particular for determining the oxygen content in internal combustion engine exhaust gases. Said sensor has a sensor element (22) which is surrounded and fixed by a seal (19) to be gas-tight in a housing (12). The seal (19) is arranged in the form of a pre-sintered, deformable sealing structure (19') in the housing (12) between a moulded ceramic structure (18) on the side of the gas to be measured and a moulded ceramic structure (20) on the side of the connection, wherein the pre-sintered sealing structure (19') can be deformed under pressure. The moulded ceramic structures (18, 20) and the sealing structure (19') have holes (32, 42, 52) extending axially therethrough. The sealing structure (19') has integrally moulded components which narrow the cross-section of the hole (42) and can be deformed by the sensor element (22) when it (22) is inserted in such a manner that said sensor element (22) is locked by the integrally moulded components in the assembly position. The moulded ceramic structures (18, 20) and the sealing structure (19') also have members each which engage positively in each other on the mutually contacting end surfaces and which orientate the moulded ceramic structures (18, 20) and the sealing structure (19') radially so that the holes (32, 42, 52) are aligned with each other.