12mm 40khz receive Ultrasonic Sensor 1. Diameter:12mmSENSOR; 2. Height:9.5mm; 3. ... piezoelectric ceramic element, SMD magnetic transducers, condenser microphones, ultrasonic sensor,Atomization piece, speakers and other audio components. And our company ... , ultrasonic cleaning, ultrasonic atomization, marine fish exploration, the range of ultrasound equipment etc.High quality, competitive price, timely ...