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Tc4s 00


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.


  • Extremely Robust Key Fob ID
  • Industrial Strength Long Life Active Tag
  • Dormant Outside Of Census Reader Fields
  • One Time Programmable 32 or 64 bit Tags
  • Hands-Free Reading up to 2.5 meters
  • Battery Low Indication
  • Encrypted Data Exchange
  • 1:100 Million Error Rate
  • CE, DTI & FCC Approved. Also available in ATEX (Intrinsically safe) approved version.


Access Control

Convenient touch free technology to easily manage access to your locations.


Automatic staff registration for safety roll call or attendance registration through real-time alerts and accurate location information.

Article Tagging

Hands free tagging allowing complete hands-free access control, monitoring the whereabouts of assets.

Car Parking

Create an intelligent parking system where the entry and exit of cars are monitored, with vehicle or driver identification, or both.

Technical Specification

TC4S 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 life at 20°C is 5 years or greater. All Census® product operates in the temperature range -20°C to +60°C.

The TC4S is available in standard and ATEX (Intrinsically safe) approved versions, the ATEX version is supplied exclusively through Davis Derby Ltd. (

Specification Details
Dimensions Teardrop 55 x 42 x 11.5mm
Weight 25g
Temperature range -20 to +60°C (non condensing)
Housing Polycarbonate
Colour Black/Blue lid



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.
  • Emergency Evacuation Monitoring - ATEX (Intrinsically safe) version available for hazardous environments.


Downloadable files containing technical information about TC4S


Trusted Supplier of RFID products since 1982

Identec Limited consistently supply radio frequency identification access control and electronic identification products that meet or exceed the requirements and expectations of our customers. We also offer a one year no quibble guarantee, and pride ourselves in our excellent after-sales customer service.

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British Touring Cars Championship sponsorship

We are once again proudly sponsoring Ronan Pearson, a dynamic and promising motor racing driver in the Kwik Fit British Touring Car Championship (BTCC) for the upcoming 2024 season.

British Touring Cars Championship sponsorship