Davis Derby Ltd has over a decade of experience in the development and supply of RFID Systems in various applications above and below ground.

These systems are based on the Texas Instruments TIRIS system and Philips Mifare technology using passive transponders or on Identec technology using active transponders.

In addition to industrial applications especially in connection with the TruckLOG driver access control system, Davis Derby Ltd has designed versions suitable for use in potentially flammable or hazardous atmospheres such as coal mines and the petro-chemical industry.

RFID systems are used for tracking the movement of personnel, vehicles and other assets such as pallets.

They comprise three components:

1. Transponders (or Tags).
   There are two types of transponder, passive devices using the TIRIS technology and Mifare technology, which have no battery, or active devices based on Itentec technology which are battery powered.
   
   Generally active devices have a longer range and cater for reading several transponders at once.
    
2. Reader units.
   The reader units interrogate the encoded information on the transponders. The Davis Derby reader units are certified for use in hazardous areas and have an in-built telemetry link which enables a number of reader units to be interconnected and linked to a central computer in the safe area.
    
3. Antennas.
   Davis Derby has developed a number of different antennas to suit different applications.