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Backpacks - VHF

OVERVIEW
FEATURES
SPECIFICATIONS
  • Backpack tags

    Backpack tags are designed primarily for birds, but suitably modified versions have also been used on mammals, fish, reptiles, invertebrates and amphibians. Bird tags weighing more than 4g are usually fitted with harness tubes. Smaller tags may be glue-mounted. We can attach nylon or muslin gauze to increase the surface area for gluing.

    Alternatively the tag can be glued onto the harness. We do not make complete harnesses. A ground plane antenna can be fitted to improve the signal range.

  • Backpack tags features

     

    Sensing options available with these VHF transmitters include Posture Sensing, Activity Sensing and/or Mortality Sensing, or Temperature Sensing, depending on the transmitter type.

  • Transmitter Weight (g) No. cells Battery Length (mm) Width (mm) Height (mm) Estimated tag life -
    20ms/50ppm **
    Estimated tag life -
    12ms/30ppm **
    Light Usual Heavy*              
    PicoPip 0.19 0.21 0.24 1 Ag190 12 5 2 2 days 3 days
    PicoPip 0.29 0.33 0.39 1 Ag337 13 5 3 10 days 3 weeks
    Pip 0.35 0.4 0.5 1 Ag337 13 7 4 10 days 3 weeks
    PicoPip 0.38 0.42 0.53 1 Ag317 14 6 3 17 days 5 weeks
    Pip 0.42 0.48 0.58 1 Ag317 14 7 4 17 days 5 weeks
    PicoPip 0.42 0.48 0.67 1 Ag379 14 6 4 22 days 7 weeks
    Pip 0.47 0.55 0.7 1 Ag379 14 7 4 22 days 7 weeks
    PicoPip 0.56 0.64 0.75 1 Ag376 17 8 5 6 weeks 13 weeks
    Pip 0.7 0.81 0.9 1 Ag376 17 8 5 6 weeks 13 weeks
    PicoPip 1.0 1.2 1.6 1 Ag392 17 8 6 8 weeks 4.4 months
    Pip 1.1 1.3 1.9 1 Ag392 17 8 6 8 weeks 4.4 months
    Pip 1.4 1.7 2.4 1 Ag393 24 9 7 3.7 months 8.4 months
    Pip 2.2 2.4 3 1 Ag386 32 13 7 6 months 13.3 months
    Pip 4 4.5 5.2 1 Ag357 32 13 7 8.4 months 1.5 years
    TW-3 6 7 8 1 CR2032 24 24 15 3.7 months 9.3 months
    TW-3 10 11 13 1 10-28 37 17 18 7.6 months 1.5 years
    TW-3 15 17 21 1 1/2AA 40 20 21 1.4 years 3.2 years
    TW-3 20 23 26 1 2/3AA 50 20 21 2.3 years 5 years
    TW-3 30 33 37 1 AA 66 20 21 2.9 years 6 years
    TW-3 30 40 50 2 1/2AA 40 30 21 2.6 years 5.5 years
    TW-3 40 50 55 2 2/3AA 60 30 21 4 years 8 years
    TW-3 65 70 80 2 AA 66 30 21 5 years 9 years

    * “Light” “Usual” and “Heavy” refer to the potting, i.e., the protective layer around the transmitter and cell. Tags that might get chewed, or are likely to be submerged, need heavy potting, whereas small birds need tags to be potted lightly, because they are unlikely to damage the tag and it is important to keep the weight down.

    ** All of our radio tags are made to order so the pulse rate (milliseconds) and pulse length (pulses per minute) can be customised for lifespan/detection range. Please see the tag chooser or contact one of our Technical Sales Advisors for more information.

    To see ranges (line of sight, above ground and ground to ground) please use our Tag Chooser.

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