Sensor adapter manufacturing method of the sensor adapter, method for inserting a sensor in this sensor adapter

Sensor adapter (10) for positioning a sensor (5), in particular an electrochemical sensor, in a medium comprising a receiving channel (20) in the positioned a sensor and by a diaphragm (32) is closed and a hollow cylindrical seal structure (40) that within the receiving channel (20) is arranged coaxially to the longitudinal axis between the sensor and the wall of the receiving channel (20), characterized in that • the end of the receiving channel (20) through a semi-permeable membrane (32) is closed, • the hollow cylindrical sealing structure (40) adjacent the semi-permeable membrane (32) and a gas-tight connection between the sealing structure (40) and sensor (5) effected, whereby the sensor (5) inside the gas-tight sealed volume of the receiving channel (20) is arranged and • the sealing structure (40) at a radial inner wall of a circumferential groove (42) with a sealing ring (50) which is movable in the axial direction in the groove (42), to form a one-way valve, the circumferential groove (42) in cross-section is formed so that the sealing ring (50) in a first axial juxtamembrane position (52) loosely in the groove (42) and in a second axial membrane remote location (54) between sensor (5) and the inner wall of the groove (42) is a compressed ,