Abstract: A measuring arrangement for autoclaves or similar arrangements under heavy climatic conditions includes at least one measuring probe, a measuring electronics connected with the measuring probe via a connection line and arranged in a thermally insulated container. The measuring electronics includes a transmitter unit to which a transmitting antenna is associated, which is arranged outside of the container on a lid provided therefor and is connected via a connection line. A separate receiver unit is associated with a receiving antenna. The thermally insulated container contains two oppositely oriented Dewar vessels arranged one within the other, the inner Dewar vessel accommodating the measuring electronics. The connection lines are led through the interspace between the Dewar vessels and are connected to a coupling tightly provided in the lid. A corresponding coupling is associated with the coupling means for connecting the transmitting antenna and the connection line to the at least one measuring probe.