• Key Fob ID
  • Replaceable Battery
  • Dormant Outside Of Census Reader Fields
  • One Time Programmable 32 or 64 bit Tags
  • Hands Free Reading up to 2.5 Metres
  • Battery Low Indication
  • Encrypted Data Exchange
  • 1:100 Million Error Rate
  • CE, DTI & FCC Approved.


Census® tags can be simultaneously interrogated with no loss of fidelity. The RF communication between each tag and reader is scrambled to eliminate the chance of simulated tokens being used. Battery low indication is a standard feature.

Census'® patented technology offers many benefits to systems designers, integrators and end users. Not least of these is that the tags do not interfere with other electronic surveillance systems resulting in false alarms etc. The typical error rate for Census® is 1:100 million in worst case noise, this is significantly better than any other tag system. Census® tags can be supplied with a fixed one time programmed 32 or 64 bit code. Strict factory audits ensure no two tags are issued with the same ID number.

TC4 have a shelf life of 7 years or greater stored at 20°C. Operational life depends upon usage. However based upon 36 uses per day of 10 seconds each, or 6 minutes continuous interrogation per day, typical cell life at 20°C is 3 years or greater. All Census® products operate in the temperature range -20°C to +60°C.


Specification Details
Dimensions Teardrop 55 x 42 x 16mm
Weight 25g
Temperature range -20 to +60°C (non condensing)
Housing Black ABS
Colour Black


The product is suitable for numerous applications, they include but are not limited to:

  • Key Monitoring
  • Hands Free Access Control
  • Time and Attendance
  • Personnel Identification
  • Personnel Tracking
  • Product Tracking.

Ordering Information

Ordered as TC4 (TC4A - USA system).

Technical Details

Download the datasheet for TC4.