Abstract: A transmitter for use in the food industry for unique identification of a transport device such as a hanger for a carcass or a container for food products is mounted within a housing which protects the transmitter from heat, water, corrosive materials and shock loads. The housing comprises a cylindrical ring having one end welded to a suitable support element on the hanger and a second open end. The transmitter itself is in the form of a flat disc molded within a generally cylindrical body which can be inserted into the ring. A male thread is formed on the outside of the cylindrical body and a female thread of the inside of the ring allowing the device to be readily attached into the ring. The body is molded from silicone rubber which provides the necessary protections while allowing the communication of signals to and from the transmitter through the open face of the ring.