Prowave 400Sx160 Ultrasonic Transducers Open Type Aluminium Housing – Prowave 400ST160, This ultrasonic ceramic transducer is an open type transmitter that come in a robust aluminium housing. Applications include remote control, data transmission, Doppler motion detectors, robotics, intruder alarms, energy saving devices, etc. A matched receiver is also available, see 35-0175. Prowave 400ST160 40KHz Aluminium Ultrasonic transmitter open type