Prowave 400Sx160 Ultrasonic Transducers Open Type Aluminium Housing – Prowave 400SR160, 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 transmitter is also available, see 35-0180. Prowave 400SR160 40KHz Aluminium Ultrasonic receiver open type