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PIT tags

The Standard FDX-B PIT Tag

The 2.1 mm × 13 mm FDX-B PIT tag is the most widely deployed transponder size in fisheries and wildlife research. Encapsulated in biocompatible glass, it carries a unique 128-bit ID and reads at low frequency with the URH-1HP-ISO, URH-2 ISO, or any ISO-compliant field reader.

  • 2.1 × 13 mm
  • ISO 11784/11785
  • ICAR certified
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The Standard FDX-B PIT Tag
The Chip Size Used in Most Field Studies
The standard size

The Chip Size Used in Most Field Studies

At 2.1 mm in diameter and 13 mm long, this is the size most PIT tagging protocols, antenna arrays, and reader pairings are designed around.

The biocompatible glass capsule and passive design mean no battery and no maintenance. The ID persists for the life of the animal. Suited to adult salmonids, small mammals where 13 mm fits, and the majority of fish and wildlife identification work.

Specifications

Protocol
FDX-B
Frequency
Low Frequency
Identifier
128-bit unique ID
Mode
Read-only
Dimensions
2.1 mm (D) × 13 mm (L)
Weight
0.10 g
Material
Biocompatible glass encapsulation
Operating Temperature
−25 °C to 85 °C
Storage Temperature
−40 °C to 85 °C
Shock & Vibration
Conforms to IEC 68-2-6/29
Standards
ISO 11784/11785
Certification
ICAR certified
Works with

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Common Questions

  • When should I use the 2.1×13 mm tag instead of the 1.4×8.5 mm?

    Use the 2.1×13 mm when implant size isn't the limiting factor, such as adult fish and small mammals. The 1.4×8.5 mm exists for cases where body mass forces a smaller tag (juvenile salmonids, small amphibians); for everything else, the 2.1×13 mm is the standard and gives you better range.

  • Which readers work with the 2.1×13 mm FDX-B tag?

    The URH-1HP-ISO and URH-2 ISO for handheld use. The URH-300HP-ISO high-power reader extends range further for stationary or antenna applications.

  • How are tags shipped?

    Tags are shipped in injection-ready cartridges, individually packaged and sterile. Standard configurations include boxes of 100, 500, 1,000, and 10,000. Contact us to confirm packaging format for your order volume.

Not Sure Which Size is Right for Your Study?

Give us a call. We can help you choose the right tags for your study.

Get in Touch Compare with 1.4×8.5 mm