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Fish Transmitters

Triton Series Fish Transmitters

NOW with longer life ... compare to Lotek’s SR Series coded tags.

Offers the highest detection rates available when used with the R4500CD Receiver-Datalogger in a complete tracking system.


  • Monitor 25 to 100 transmitters using one frequency
  • Monitor up to 1,200 transmitters using the ATS R4500CD Receiver
  • Slower pulse rate to maximize battery life
  • Compare to Lotek SR Series
  • Available in all popular attachment styles, and in 30 to 220 MHz frequency ranges.
  • Programmable for a wide range of mortality and duty cycle requirements

How it Works

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 R4500CD 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.


Use in Coded Fish Tracking Systems

Triton Series transmitters are used with R4500CD 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.


Transmitter Type
Crystal controlled 2-stage
Calibration Tolerance
Frequency Stability
±2.5kHz, -20°C to 40°C
Pulse Rate and Width
Typical pulse train: 20, 5, 5ms (controlled by uC)
Pulse Rate Variation
0.01%/volt, ±0.01% for temperatures -20°C to +40°ÂºC
By removing magnet
Electrical resin, water-proof, specific gravity: 1.12. Coated with USP Class VI material

Ordering Information

Select "C" models from F1800 Series Fish Transmitter page

Specify frequency range when oprdering


Half the calculated minimum battery life

Pic tags


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