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PSAT Series: Pop-Off Satellite Archival Tags

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  • Overview
  • Features
  • Specifications
  • Product Sheet

Gain valuable insights into the life cycle of your species.

The Lotek PSAT family of Pop-up Satellite Archival Tags are designed with a focus on reliability, longevity and ease of use. The hydrodynamic design and testing have delivered a tag with superior stability in the waterflow, causing less drag and eliminating the oscillations observed in other tag designs, which may contribute to premature tag detachment. The Lotek PSAT is available in two standardized models, the PSATGEO and the PSATLIFE, and the custom programmed model PSATFLEX.

The Lotek PSATGEO and PSATLIFE tags provide daily locations throughout the deployment period by sending on-board processed light geolocation position estimates, not raw light data. In addition to the position estimates, these tag provide other daily summary data including temperature, SST and depth.

The PSATLIFE is designed for short-term post-release survivorship studies of non target species by-catch and other studies requiring short term records of pressure and temperature.

The PSATFLEX can be configured for short or long term studies, with the chosen sensors sampled at a user-defined interval.

Filtered 3 month PSAT track of an Atlantic bluefin tuna from Spain to the Labrador Sea. (Filter set to 2 degrees of latitude and 1 degree of longitude)
  • Low drag, stable design for maximum retention and minimum impact to study animal.
  • Constant depth function releases the tag from the study animal if it sinks to the bottom or floats to the surface to allow data transmission.
  • Improved data throughput via Argos by sending daily location estimates and summary data instead of raw light data (PSATGEO and PSATFLEX)
  • The Lotek Template-Fit light geolocation algorithm offers locations with error estimates (PSATGEO and PSATFLEX)




Watch this video to see a comparison of traditional vs. Lotek design tags as they respond to increasing water speeds in a cavitation tunnel:

Length 125 mm
Tube (outside) diameter 19 mm
Max. diameter (collar) 40 mm
Weight in air 89 grams
Operating life Up to 1 year Up to 28 days Up to 1 year
Depth rating 2000 m
Buoyancy 8 grams
Operating temperature -5° to +60° C
On-board memory 8 Mbytes
Standard depth ranges
500 m, 1000 m, 2000 m
Wet-start function YES
Constant depth release none, 3day/5m, 3day/15m 0-max depth for 0-999 days
Sensors Light, Pressure, External Temperature, Wet/Dry
Pressure sensor Accuracy +/- 1 %, Resolution 0.05 % (of full scale)
Temperature sensors Range -5 C to 35 C, Accuracy +/- 0.2 C, Resolution 0.05 C
Clock accuracy Better than 2 mins per year


PSAT drag force chart

N.B. These specifications are subject to change.