Automatic Monitoring

Fish migration

Database for PIT Telemetry
VisAdvies Projects

PIT Telemetry Applications

Fish migration

Effectiveness of fish passages

Tag and Recapture

Data Analysis

PIT Telemetry

Passive integrated transponder (PIT) telemetry is a method using antennas and tags. The system is based on the fact that fish marked with PIT tags, which pass an antenna, are detected on the PIT tag reader. Interested in using PIT telemetry for fish monitoring? Follow the animation by scrolling down for more information on our PIT telemetry system.

PIT tags

PIT tags don’t have a battery, but a coil and are therefore called passive instead of active. Since the tags are passive they can last a lifetime. The tags for PIT telemetry range from 12 mm to 32 mm. The size of the tag that will be used depends on the size of the fish species. The PIT tag is inserted into the abdominal cavity of the anaesthetised fish using a hollow needle or through an incision.

The Antenna

Before fish are tagged, the PIT antennas are placed at the desired location. The antenna consist of a durable plastic frame into which an insulated copper wire is inserted. This way, every antenna can be custom made. Every antenna has a tuner box which ensures that the antenna functions optimally for detections. A tag, which comes within range of the antenna, will be charged by the magnetic field of the copper wire. The charged tag sends its unique code, which will be received by the antenna. The whole cycle takes place within a fraction of a second. The signal is transferred through cables to the reader which stores the detection, time and date. The PIT telemetry data can provide insight into the behaviour and dispersal of fish.

PIT Station

Every PIT-station contains a reader, a Wireless Internet Module (WIM) and batteries.

Yellow: The reader can simultaneously monitor four antennas and processes the detections. The WIM then sends the detections to the cloud. The storage capacity of the system is virtually unlimited.

Orange: The WIM ensures that the detections are sent to the cloud every 24 hours for further processing. Each detection includes the unique PIT tag number, the number of the detection antenna and the time/date of detection.

Green:The PIT-stations can be powered by a mains connection or a solar panel in combinations with two batteries.


The detections in the database of the reader are uploaded to the VisAdviesAMF application every 24 hours. The application makes storing, managing and visualizing the PIT telemetry data simple and allows the user to access the data from anywhere.

Would you like to get access to

VisAdvies AMF?

VisAdviesAMF is a cloud-based database for storing, managing and visualizing your PIT telemetry data. It provides the necessary tools and insight into your PIT telemetry research and helps you quickly prepare detection data for further analysis.

Get in touch

Get in touch with one of our experts and we will explain the further details of PIT telemetry and how it can be applied to your research.
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