Hydroacoustic Technology, Inc.
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  Marine-Focused Acoustic Tags 80 kHz  
 > Ideal for Tracking in Marine Environments - 980-Series Acoustic Tags
  A breakthrough in marine fisheries research, the recently released 980-Series Acoustic Tags are specifically designed for tracking aquatic life in marine environments.

Unlike other systems, researchers can track hundreds of fish in one area at the same time. They are immune to tag signal collision and data loss. Having the ability to track hundreds of fish simultaneously without compromising collected data while at the same time having a fine-scale resolution (to 20 cm) and broad ranges at over a kilometer was previously non-existent.

Why 80 kHz? Previous studies in acoustic tag frequency for use in marine environments focused primarily on tag size/tag range trade-offs due to absorptions. Scientists have recently learned (e.g., NOAA Fisheries NW Fisheries Center studies) that another factor to possibly consider is the frequency that marine mammal predators, in particular harbor seals, can detect some acoustic tag emmissions resulting in increased fish predation. See "Dinner Bell Effect". At 80 kHz, scientists have found the best compromise for maximizing tracking resolution and range while being outside of the auditory ranges of most marine mammals.

Similar to HTI's freshwater-focused acoustic tags at 307 kHz, the 80 kHz tags are also user-programmable and work with HTI's Acoustic Tag Tracking Systems offering an efficient means of remotely tracking fish in 3D or 2D with fine-scale (to 20 cm) resolution. View data via mobile device (e.g., smart phones or tablet) for immediate access from anywhere in the world.

To identify tags out-of-water or after battery life has expired, an Acoustic / PIT Tag option is available for all HTI Acoustic Tags.

Find out why leading fisheries researchers are using scientifically proven HTI acoustic tags.

Marine-Focused 80 kHz Acoustic Tag & 80 kHz Hydrophone

Dive with us in the Salish Sea (north of the Puget Sound) along an unedited trip scouting locations to place mounts for hydrophones.
why 80 kHz
  Key Features of Acoustic Tags
Fine-Scale 2D & 3D tracking to 20 cm resolution and at ranges over 1 kilometer.
Small tag size Monitor fish data in real-time or in post-processing.
Small tag size Track hundreds of fish in the same area simultaneously; signals are immune to tag collision.
Small tag size Acoustic / PIT Tag combination available.
Tag animations
Access data remotely from anywhere in the world.
Tag animations
Designed for the marine environment and outside of the auditory range of most marine mammals.

Approx. Life*

   Acoustic Tag Family in air grams in fresh-
3 sec 
10 sec 
   HTI 980-MX 16.0 48.0 9.65 80 156 18.5 9.65 3 yr 5 yr
   HTI 980-MV tba tba tba 80 158 2.0 0.9 tba tba

* While, future predation detection may be included in all 900-Series Tags, they are presently only offered in the 900-PB and 900-PD. Estimated life can be extended by decreasing Pulse Width (PW) and/or increasing Pulse Rate Interval (PRI). Tags operate at 307 kHz or 80 kHz.  Length, diameter, & weight may vary +/- 10%. Life quoted is based on operating parameters of 1 msec pulse width, single pulse, at 10°C. Acoustic / PIT Tag combinations are available for all HTI Acoustic Tags.

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email HTI home site map Spec Sheet w/ PIT Tag Why 80 kHz