• Avian

LAT TDRs for Birds

  • Product Type Icon Tag

Time, Temperature and Depth Recorders for Birds

Recording bird diving behaviour in the wild is a challenge, so these tags are designed to log when the birds are on the water and the depths to which they dive, together with temperature for enhanced interpretation. With 128 MB on the larger tags, you can record plenty of dive behaviour.

The LAT series is the ideal data storage solution for any biologist seeking reliable long-term life-cycle-related data for any diving species.

If you want to sense light levels for geolocation, see our LAT2000 Series geolocators.


  • Sensors: Wet/dry sensor, Internal temperature, Depth, Light
  • Product Features

    A Selection of Pressure Ranges
    Improves accuracy for shallower divers.

    Wet/dry and Temperature Sensors
    To help you see when birds are in water, and trigger pressure recording for dive profiles.

    Multiple Memory Management Options for Flexible Scheduling:
    1. Telescoping Log: allows the total times series storage capacity of the tag to be evenly distributed over the entire mission.
    2. Conditional Log: samples recorded (or not) based upon the condition of one or two sampled “loggables”;
    3. Basic Log: straight sampling.

    User chosen resolution
    Can help balance the number of samples with the resolution of some sensors

    Up to 128 Mbytes of non-volatile memory are available on specific models.
    LAT tags are designed for miscellaneous data collection and data compression strategies aimed at maximizing and optimizing tags’ operating life and number of samples taken.

    All LAT archival tags use a USB reader and a communication interface, LAT TagTalk.
    The reader is practical for field work as it connects to the tags’ gold electrical contacts using minigrabbers – this method is very stable and reduces the risk of interfering with the connection if the tag is moved. The software allows the user to interact with the tag, to create a flexible programming regime and to download the data from the tag.

  • Product Applications

    The LAT temperature, depth and time recorders have been used successfully with many seabirds.  They are robust, so can be fitted to the birds legs which is both better for the welfare of the seabird than harness mounting, and means that time on the water is recorded.  With diving frequency and depth, you can learn about feeding behaviour during periods when they are out of sight.

  • Product Specifications

    Model LAT1800S LAT1800L
    Expected life [1] (months) 12 24
      Tubular form factor:
    Size (ØxL) (mm) 11 x 38 13 x 44
    Weight (g) 7 11
      Flatpack form factor:
    Size (LxWxH) (mm) 36 x 11 x 7.5 36 x 13 x 10
    Weight (g) 6 10
    Memory 128MB

    1. The estimated life is based on a single deployment with a sampling interval of no less than 10 seconds. If you plan to deploy for multiple short deployments and/or sample at shorter intervals than 10 seconds, please contact your telemetry specialist.
    For minimum life expectancy associated with sampling intervals less than this, please contact the appropriate Lotek Telemetry Specialist. N.B.
    These specifications are subject to change.

    Technical Specifications:
    Temperature measurement range: -20˚C to 45˚C
    Temperature calibrated range: -5˚C to 35˚C
    Temperature sensor resolution: 0.05˚C or better
    Temperature sensor accuracy: better than ±0.2˚C
    Depth range: 50m, 200m, 500m, 1000m, 2000m (LAT1400, LAT1500, LAT1800S & LAT1800L)
    Depth accuracy: ±1% of Full Scale
    Depth resolution: 0.05% of Full Scale
    Data analysis software: Yes
    Sample rate setting: >1s in 1 sec. increments
    Number of log structures allowed: 4
    LAT tags require a LAT Tag Reader for scheduling that tags and downloading data.
    Locations can be computed with LAT Viewer Studio. The software allows Template Fit and Threshold analysis

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