PUI Audio Ultrasonic Receivers, Transmitters, and Benders use a band of audio above 20KHz, above human hearing and is very directional and reflective. The ultrasonic sensors feature an integrated piezo-electric bender that has a resonant frequency targeted for ultrasonic use, and work identically to that of a standard piezo-electric bender. The sensors can be used to measure distance, in fluid flow and fluid level systems, detecting glass breakage and with ultrasonic cleaning systems. Applications include health/medical, oil and gas non-destructive testing, automotive and commercial/industrial equipment cleaning industries.