Air ultrasonic transceivers open pulse transit type prowave 400pt160 a 40khz oslash 16mm open pulse type ultrasonic transceiver with an aluminium case the transducer has a ceramic resonator and is especially designed for echo ranging systems the transceiver requiring a shorter ringing characteristic compared to standard type transducers suitable for a wide range of applications such as remote control devices robotics intrusion alarms energy saving equipments etc prowave 400pt160 40kh