Patent ID: 6840266

Claim:
An interchangeable fitting, comprising a fitting housing, a removable measurement probe which is movably guided axially in the housing for insertion into a container, a shut-off element which closes the fitting relative to the interior of the container, and a guide means which can be guided to move axially in the housing for holding and guiding the measurement probe in the fitting housing between a measurement position in which the measurement probe has been inserted into the container, and a stand-by position in which the measurement probe is located within the fitting housing, the measurement probe comprising a measurement probe body and a sensor, wherein the measurement probe is fixed with its measurement probe body on the end face of the guide means, the sensor being mounted on the free side of the measurement probe body which points in the direction to the container and the cross section of the guide means being smaller than the cross section of the measurement probe wherein the fitting has a mounting means which fixes the measurement probe in the measurement position and the stand-by position on the fitting, the mounting means interacts with the shut-off element in order to prevent removal of the measurement probe when the shut-off element is opened, the mounting means comprises a tension screw union which comprises a tension unit and a screw connection unit, the tension unit being guided on the fitting and the tension unit and the measurement probe or the guide means can be interlocked, and by turning the screw connection unit the tension unit can be braced with the measurement probe or the guide means.