UHF Wet Inlay Web DF EM4423

Smartrac Web DF combines RFID HF (NFC) and UHF technology in one single inlay. You can read it both with a NFC-enabled smartphone and a UHF reader.


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Smartrac Web DF is equipped with the EM4423 chip that combines two functionalities on one single die: the EPC technology used for long-range application purposes, and the NFC technology used to exchange data in close proximity. Both protocols may share a common, unique ID.

Technical Specifications:

  • IC: EM4423
  • Memory: 1920 bit (240 byte) - memory can be accessed and written using both ISO 18000-63 / Gen 2 and ISO 14443A-3 protocols
  • Frequency: HF 13.56 MHz and UHF 860-960 MHz
  • Antenna Size: 50 x 30 mm / 2.0 x 1.2 in
  • Die-Cut Size: 54 x 34 mm / 2.1 x 1.3 in
  • Web Width: 60 mm / 2.4 in
  • Operating Temperature: -40°C to +85°C / -40°F to +185°F
  • Adhesive: Acrylic, water borne adhesive
  • Shelf Life: +20°C, 50%RH / 68°F, 50%RH - minimum 2 years from the date of manufacturing

Application Areas:

  • Retail
  • Loyalty programs
  • Media & Advertising
  • Product Authentication
  • Inventory Management
  • Supply Chain Management

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