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Electronic ID Tags

Allflex Half Duplex (HDX)

  • Tamperproof Ultra Cap provides ultimate security and retention
  • HDX technology optimizes signal transmission and provides greatest possible read distance
  • Beneficial for use in packing plants, automated reading systems, or with a walk-through reader
  • ISO compliant
  • HDX Tag weight: 8.9 grams

Allflex Full Duplex (FDX)

  • Tamperproof Ultra Cap provides ultimate security and retention
  • FDX technology is sufficient for capturing data, if read range is not an issue
  • ISO compliant
  • FDX Tag weight: 5.6 grams

We also have a full line of USDA EID Tags and Allflex Electronic ID Readers.


Typical read range on HDX tags ranges from 38cm - 46cm (15" - 18") while typical read range on FDX tags ranges from 35cm - 41cm (13" - 16"). However, FDX tags are more susceptible to interference from metal and steel objects such as head gates, panels, and squeeze chutes as well as fluorescent lights. We have found that most cow-calf producers select HDX tags.