Back up sensor is one of the applications of ultrasonic transducers in the air. Using the piezoelectric ceramic transducer to transmit the ultrasonic signals and receive the echoes, the distance of an obstacle is thus obtained by calculating the time lag between signal transmitted and received.

Unictron’s backup sensor elements offer high sensitivity, high sound pressure with excellent durability and reliability. Being the major piezoceramic supplier in Taiwan, we can offer piezoceramic discs with various dimensions. Our engineering teams have been working in the piezoceramic industry for more than 25 years. We have a sound background in materials formulations and ceramic processing technologies. With advanced characterization and manufacturing facilities, we are able to develop and mass-produce various dimensions of piezoceramic elements with high performance to meet your demands.


  • Piezoceramic transducers to produce ultrasonic signal for distance measurement needed in automotive backup sensors.


  • High sound pressure
  • Excellent durability and reliability
  • High sensitivity
  • Low-temperature coefficient
Resonant Frequency
at 1kHz (nF)
Disc7.00.18300.0 ± 10.02.902
Disc5.30.15405.0 ±10.01.802

* Other dimensions are available upon request.