Abstract: An RFID device is provided for communicating with at least one RFID transponder that has a transmitter, a receiver, a transmission antenna and a reception antenna for emitting and receiving RFID signals and has a control and evaluation unit that is configured to transmit and receive an RFID signal in a respective one of a plurality of frequency channels, in particular to encode RFID information into the RFID signal and/or to read information from the RFID signal in accordance with an RFID protocol and to carry out an intensity adaptation of the RFID channel in dependence on the frequency channel used for the transmission and reception.

Abstract: An RFID reading apparatus (20) for shelf occupancy detection, the RFID reading apparatus (20) having an antenna (16, 18, 24), wherein the antenna (16, 18, 24) comprises a housing and an antenna circuit board (24) arranged in the housing, wherein the housing has an elongate hollow profile element (18) with the antenna circuit board (24) inserted into the hollow profile element (18).

Abstract: An RFID reading apparatus (20) for shelf occupancy detection, the RFID reading apparatus (20) having an antenna (16, 18, 24), wherein the antenna (16, 18, 24) comprises a housing and an antenna circuit board (24) arranged in the housing, wherein the housing has an elongate hollow profile element (18) with the antenna circuit board (24) inserted into the hollow profile element (18).

Abstract: A housing surrounds a compressor for cooling media and forms at one axial end of the same a chamber which receives from the compressor one or more streams of gaseous cooling medium in which compressor lubricating oil is entrained. The chamber communicates with an outlet of the housing and is filled with a body of gas-permeable material through which the stream or streams must pass on the way to the outlet, and which separates entrained oil from the gaseous cooling medium.