In a coded system, many transmitters can share a single frequency. This allows you to differentiate a large number of tags using fewer frequencies, while still detecting fast moving tags, even when they pass by a station at the same time. Because coded tags consume more power than standard tags, ATS engineers slowed down the tag’s pulse rate to maximize tag life.
Our new Triton Series tags now provide over twice the life of our regular coded models, with no increase in weight. The tags have a slightly longer life than Lotek’s SR type of coded tags, for a comparable weight.
Originally developed to accommodate large scale riverine projects in Alaska, ATS’ coded systems are now used by fish researchers world-wide. A coded system for fish typically consists of hundreds of tags, and several receive sites, where dataloggers like the ATS R4500C, or R4520C Receiver – Datalogger, are installed.
These receivers feature digital signal processing technology, and so can distinguish the passage of 15 co-located fish within 15 seconds, with 100% accuracy. ATS coded systems are known throughout the industry for their extremely low (<2%) rate of false positive "hits."
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Use in Coded Fish Tracking Systems
Triton Series transmitters are used with R4500C and R4520C Receiver-Dataloggers. Both feature highly sophisticated digital signal processing techniques to provide accurate and reliable fish passage data.
The unattended receivers are typically located at sites along a river, on a 20 foot tower with two yagi antennas, and an antenna switchbox. A self contained power supply and solar panel allow for continuous monitoring over several months. An ATS remote data platform (RDP) can be used to automatically send data to your office using cellular or radio communication.
Features and specifications subject to change without notice
Remote receive site with 20 ft. tower and
ATS R4500C Receiver - Datalogger