Abstract: The system provides for one single cable with four electrical conductors (16 to 19). Two of the conductors (18, 19) form a field bus line for the signal transmission, and the other two conductors (16, 17) form an energy line for providing energy supply. All signal transmitters (1, 2) and signal receivers (3, 4) are connected to the cable, and the cable (16-19) is fitted at both ends with a line termination (20-22). Each signal transmitter (1, 2) and each signal receiver (3, 4) has a field bus controller (8, 10). The entire signal transmission takes place via the two-wire field bus line (18, 19).

Abstract: A probe for monitoring a medium within a container, which includes a mounting housing for mounting the probe on a container, a neck part attached at one end to the mounting housing, and at the other end to a radially cantilevered head housing. The head housing extends on only one side of the neck part. A sensor is attached to the mounting housing. An electrical conductor is attached to the sensor and extends through the neck part and into the head housing where it is connected to an electronic circuit, which is mounted inside the head housing. The head housing is made so that its dimensions in the radial direction of the neck part are greater than the dimensions of the neck part. The cantilevered mounting of the head housing allows heat from the container to dissipate into the atmosphere without contacting a significant portion of the head housing. The configuration of the head housing also allows easy access to the electronic circuit, even if two probes are placed in close proximity to each other.