Equipment Ultrasonic sensor for bats Pettersson D240X D240X €1,199.00 The Pettersson D240X is an ultrasonic sensor easy to handle and very powerful for converting ultrasound in an audible sound. It is primarily designed to study bats and other animals emit ultrasons.Le detector has two independent ultrasonic conversion systems, a heterodyne system and a time expansion system. The detector is equipped with a digital display... Add to cart