D500X Ultrasound Detector/Recorder Mk I

15,500 kr excl VAT


The D500X is an ultrasound recording unit intended for long-term, unattended recording of bat calls. In contrast to time expansion bat detectors, the D500X records full-spectrum ultrasound in real time with virtually no gaps between recordings. The recorder is equipped with four slots for CF cards, which typically makes it possible to leave the unit in the field for more than a month. The triggering system allows the device to automatically start recording as a sound is detected.

Additional information

Weight 1200 g
Dimensions 165 × 170 × 53 mm

Direct, high-speed recording


Advanced electret, jack for external microphone

Frequency range

15 kHz – 190 kHz (500 kHz sampling rate, high-pass filter enabled)
5 kHz – 190 kHz (500 kHz sampling rate, high-pass filter disabled)


External microphone, external trigger, external DC supply


Four on/off periods per day


4 x AA size, Alkaline or NiMH recommended

External DC supply

5.5-8 V, typically ca. 200 mA (average, when recording), depends on CF card type and number of CF cards


ADC Resolution: 16 bits
Anti-aliasing filter: Yes, 8th order, 190 kHz cut-off frequency
Sampling rates: 44.1, 300, 500 kHz (optimized for 500 kHz)
Recording length: 0.3, 0.5, 1, 2, 3, 5, 10, 20 sec or manual recording
Recording medium: CF card, 4 slots