PIT Tags – High-Performance FDX-B & HDX Tags for Fish Tracking, Salmon Research, and Wildlife Monitoring

PIT tags (Passive Integrated Transponder tags) are passive RFID micro-transponders used to individually identify fish and wildlife. Widely applied in hatchery programs, migration studies, long-term ecological monitoring, and conservation research, DO RFID TAG Manufacturer provides ISO-compliant PIT tags, readers, injectors, antenna systems, and complete monitoring kits suitable for both laboratory studies and large-scale river deployments.

This page provides a comprehensive guide to PIT tags, including specifications, applications, implantation methods, and purchasing options.

What Are PIT Tags and How Do They Work?

A PIT tag contains a microchip and a coil antenna encapsulated in a durable bioglass capsule. When a tagged animal passes through a PIT antenna, the tag is energized by the electromagnetic field and transmits its unique ID number. Passive PIT tags do not require a battery, providing lifetime identification with no maintenance.

Key Features:

• Passive RFID, no battery required

• Unique ID code for individual tracking

• ISO 11784/11785 compliant

• Biocompatible and long-term safe for animals

• Works in freshwater and marine environments

• Compatible with handheld and fixed readers

PIT Tag Types: FDX-B vs HDX

FDX-B PIT Tags

• ISO-compliant, widely used for fisheries research

• Compatible with most hatchery and research readers

• 134.2 kHz frequency

• Fast reading, ideal for small-bodied fish

HDX PIT Tags

• Higher noise resistance in rivers and streams

• Longer read range for large-scale deployments

• Suitable for adult salmonids and larger fish

Available PIT Tag Sizes and Technical Specifications

FDX-B PIT Tags

• 1.25 x 7 mm

• 1.4 x 8 mm

• 1.5 x 8 mm

• 2 x 6 mm

• 2 x 8 mm

• 2 x 10 mm

• 2 x 12 mm

• 3 x 13 mm

• 3.85 x 23 mm

• 3.85 x 32 mm

• 4 x 34 mm

HDX PIT Tags

• 2 x 12 mm

• 3 x 13 mm

• 3.85 x 23 mm

• 3.85 x 32 mm

• 4 x 34 mm

Selecting the Right Size:

• Juvenile salmon/trout: 1.25 x 7 mm – 1.5 x 8 mm (FDX-B)

• Adult salmonids/larger freshwater species: 2 x 10 mm – 4 x 34 mm (FDX-B / HDX)

• Long-term river monitoring / large fish: 3.85 x 23 mm – 4 x 34 mm (HDX preferred)

All tags are bioglass encapsulated, sterilized, and individually tested. Our technical team provides recommendations based on species, age, study type, and tagging environment.

• pit-tag-8mm, pit-tag-12mm

• fdx-b-vs-hdx

• pit-tag-for-salmon  and  pit-tag-for-trout

• pit-tag-reader  and  pit-tag-gun 

Comparison Table

Use Cases

Hatcheries

• Juvenile tagging for growth and survival monitoring

• Parentage tracking

• Stock management

Salmon and Trout Migration Studies

• Smolt-to-adult return tracking

• Fish ladder and dam passage detection

• Longitudinal population studies

Conservation Programs

• Endangered species identification

• Habitat restoration evaluation

• Stream and river monitoring

Laboratory Research

• Controlled experiments on small mammals, amphibians, reptiles

• Behavioral tracking and ecological studies

Downloadable Resources 

• PIT Tag Specification 

• Implantation Guide / User Manual 

• Antenna Setup Guide 

• Datasheet and Compatibility Chart 

PIT Tag Readers and Antenna Systems

• Handheld portable readers

• USB/RS232 desktop readers

• Waterproof field units

• Fixed antenna plates for tanks and streams

• River-scale antenna arrays

• Custom long-range antenna solutions

PIT Tag Guns and Implantation Kits

• Stainless steel injectors

• Pre-loaded sterile needles (single-use or reusable)

• 8 mm and 12 mm needle sizes

• Full implantation kits for hatcheries or field studies

Why Choose DO RFID TAG Manufacturer?

Quality Assurance

• Individually tested tags

• Bioglass-encapsulated for durability

• Calibrated for consistent read range

• ISO and ICAR compliant

Large-Scale Production & Supply

• Fast lead times for bulk orders

• Stable supply for long-term projects

• OEM and custom ID programming available

Technical Support

• Tag size recommendations

• Antenna placement and reader setup

• Implantation guidance

• Study design consultation

Bulk Pricing, MOQ, and Ordering

• Small trials: 100 pcs

• Standard bulk: 1,000–5,000 pcs

• Large-scale programs: 10,000–100,000+ pcs

• Special pricing for government, universities, and conservation programs

Contact us with your quantity, tag size, and project details for a customized quote.

Shipping and Delivery

• Worldwide DHL, FedEx, UPS

• Lead time: 3–7 days

• Sterile packaging for immediate use

• Export documentation available

Frequently Asked Questions (FAQ)

Q: Are PIT tags safe for salmon and trout?
A: Yes, correctly implanted PIT tags are biocompatible and safe.

Q: How long do PIT tags last?
A: Passive PIT tags last the entire lifespan of the fish.

Q: Which tag size is best for juvenile salmon?
A: 1.25 x 7 mm – 1.5 x 8 mm (FDX-B).

Q: Are your PIT tags compatible with other systems?
A: Yes, all tags are ISO-compliant and compatible with most FDX-B and HDX readers.

Q: Do you provide full monitoring systems?
A: Yes. Tags, readers, antennas, injectors, and accessories are all available.