The Anabat bat detector system is designed to help users identify and survey bats by detecting and analysing their echolocation calls by passive detection, in which the detector is used as a logging device to monitor bat activity in the absence of human intervention.  The Anabat SD1 detector is a frequency division detector that records broadband data which can be analyzed using Zero-Crossings Analysis, this provides a record of all frequencies picked up by the detectors microphone (unlike a heterodyne detector which has to be constantly tuned to the call) and requires relatively small amounts of data.  Each recording from the detector is individually date and time-stamped to enable analysis of the activity throughout the period of the survey.

The detector is housed in a weather proof box and is powered by a 12v battery and can be left unattended for up to a month, dependant on battery capacity.  The detectors are left in place at each site for between a week and ten days so that any patterns in bat activity can easily be identified, this also allows for those nights when climatic conditions are less favourable for bat activity.

To accurately monitor climatic conditions a data-logger recording temperature and relative humidity is left with the detectors.

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