ARFC25
Active RFID tag was designed in house for a client, based on the CC2500 RF chip from Texas Instruments. Operating in the 2.4GHz frequency range with automatic collision detection and re-transmission, using extensive power saving mode enabled an average tag life of around 3-4 years.

Active tag in various prototype stages and formats used for RF verification. Below, a variety of other designs using RF, GSM and embedded controllers.

2.4GHz two way Telemetry Gateway. RFID Area Controller.
GSM based data communication device. Various add on prototype shields for the Raspberry Pi.