Beeper Transmitters
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PicoPip / Pip / TW-x Tags

OVERVIEW
PicoPip
Pip
TW-x
  • Radio-tags are what Biotrack supplies to researchers for fitting to animals so that they can study them. A radio tag consists of a transmitter circuit, that may include a sensor, a cell (battery) that provides the power, and it is then protected with potting and furnished to make attachment to the animals as easy and kind as possible. The attachment techniques are described in detail under the Radio Tags link, whilst here you can find out about transmitters, sensors and how to start tags.

    Transmitters

    Radio transmitters are small sealed units that contain the electronic circuitry needed to produce radio signals. For more details of their specifications please see the pdf files.

    The TW-3 has a 'two-stage' transmitter circuit board with separate oscillator and amplifier/antenna matching circuits. It has an independent pulse-forming circuit (CMOS astable multivibrator) on a second board and is built mainly from surface mount components.

    The TW-4 has a 'two-stage' transmitter circuit board with separate oscillator and amplifier/antenna matching circuits. It has an independent pulse-forming circuit (astable multivibrator) and is built from some of the smallest surface mount components available.

    The 'Pip' range of transmitters are 'two-stage' transmitter circuit boards with separate oscillators and amplifier/antenna matching circuits. It has an independent pulse-forming circuit (astable multivibrator) and is built from some of the smallest surface mount components available, including a surface mount crystal. The inclusion of this small crystal is the main advance in the Pip, and enables 0.3g to be shaved off the weight of our small tags.

  • Great for tracking invertebrates, small birds and mammals, amphibians, reptiles… And fully customised for your study

    Tag Weight
    (g)
    Lifespan (days) Battery
    12ms, 30ppm 20ms, 50ppm
    0.29 - 0.39 23 10 Ag337
    0.38 - 0.53 38 17 Ag317
    0.42 - 0.67 50 22 Ag379
    0.58 - 0.75 88 39 Ag376
    1.00 - 1.60 133 59 Ag392

    The lifespans of these tags can be adjusted by other combinations of pulse rate and pulse length. Pulse length is measured in ms, pulse rate is pulses per minute. There is a trade-off between tag life and detection range, generally the longer the tag lifespan, the lower the range (and vice-versa). Tags can also be customised for shape as all of our tags are made to order. Tag weight varies with antenna length, protection and attachments.

  • The 'Pip' is a 'two-stage' transmitter circuit board with separate oscillator and amplifier/antenna matching circuits. It has an independent pulse-forming circuit (a stable multivibrator) and is built from some of the smallest surface mount components available, including a surface mount crystal. The inclusion of this small crystal is the main advance in the Pip, and enables 0.3g to be shaved off the weight of our small tags. For the very smallest tag, this represents a weight reduction of nearly 60%. The transmitter is named after Britain's smallest species of bat (Pipistrelle). The frequency bands that these Pip tags are currently available on are listed below.

    Tag Weight
    (g)
    Lifespan (days) Battery
    12ms, 30ppm 20ms, 50ppm
    0.35 - 0.50 18 8 Ag337
    0.42 - 0.58 30 13 Ag317
    0.47 - 0.70 39 16 Ag379
    0.70 - 0.90 69 29 Ag376
    1.10 - 1.90 104 44 Ag392
  • The TW-5 has a 'two-stage' transmitter circuit board with separate oscillator and amplifier/antenna matching circuits. It has an independent pulse-forming circuit (crystal-controlled Microcontroller) and is built almost entirely from surface mount components.

    Product sheet

    Sensing options available with these TW-x transmitters include Posture Sensing, Activity Sensing and/or Mortality Sensing, or Temperature Sensing.

Beeper Transmitters
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