Savi technology this week unveiled a version of its legacy radio frequency identification (RFID) tag for use in harsh operating environments.

The ST-656 clamps onto the left door of a shipping container, which enables the RFID electronics to be protected on the inside of the container, the company said. A low-profile plate on the outside of the container incorporates an antenna that transmits to fixed or mobile readers. In addition, the external plate contains a beeper that provides audio alerts regarding the tag’s location and status.