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The BQLZR Al. High Conversion Efficiency 60W 40KHz Ultrasonic Piezoelectric Transducer is a high power transmitter that works well for ultrasonic cleaning. It cannot be used as a receiver as it has a lot of mass in the driver. The transducer has a resonant frequency of 40KHz and has a calculated voltage of 34V avg and 70 peak. To connect it, solder wires onto the tabs - the middle tab is positive while the tab closest to the metal horn is negative. One customer received one transducer for 40KHz and another for 28KHz. Another customer mentioned that the product works well for stifling dogs at a distance.
