TK4100 White Cards With Pre Printed Numbers - EM4000 (EM4100/EM4200) Cards 125kHZ Read-only Proximity Cards

Overview: TK4100 White Cards with Pre-Printed Numbers

TK4100 white cards with pre-printed numbers are standard CR80-sized PVC proximity cards embedded with a 125kHz read-only RFID chip. They are widely used for physical access control, time-and-attendance systems, membership tracking, and identification badges.

The “pre-printed numbers” feature typically refers to the physical laser-engraved or inkjet-printed card ID (UID or sequential numbering) displayed directly on the surface of the white card, making it easy to match the physical card to a user profile in a database without needing to scan it first.

Key Technical Specifications

  • Chip Type: TK4100 (Read-Only, fully compatible with EM4100 / EM4200 systems)

  • Operating Frequency: 125 kHz (Low Frequency / LF)

  • Memory Capacity: 64-bit / 40-bit unique ID (Manchester code format)

  • Card Material: High-quality PVC or composite options (PET/ABS)

  • Dimensions: Standard CR80 (Credit Card Size) — $85.6 \times 54 \times 0.84/0.86\text{ mm}$

  • Surface Finish: Glossy or matte white, optimized for secondary ID card personalization (thermal printing or reverse-transfer printing)

  • Read Range: Typically 2 cm to 10 cm (depending on the external reader)

Why Choose Pre-Printed Numbered Cards?

  1. Easy Visual Verification: The internal chip code (UID) or a sequential batch number is printed directly onto the surface. This allows administrators to quickly hand out cards matching a specific employee, student, or member ID spreadsheet.

  2. Operational Efficiency: Saves time during mass enrollment into access control or attendance software—you can simply type the visible number printed on the card rather than wave every card against an enrollment reader.

  3. Clean, Professional Base: Clean white PVC surfaces allow businesses to apply their own branding, employee photos, names, or corporate logos via desktop card printers (e.g., Zebra, Evolis, Magicard) while utilizing the pre-existing external numbering for database mapping.

Common Applications

  • Time and Attendance Systems: Frequently paired with biometric and RFID clock-in terminals.

  • Access Control & Door Entry: Used in corporate offices, residential buildings, and gated parking lots.

  • Membership & Loyalty Tracking: Fitness clubs, leisure centers, and educational facilities.

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