Piezoelectric materials convert electrical energy directly into mechanical energy and vice versa. Their motion is based on crystalline displacements, so there is neither friction nor wear. Piezoceramic components can be used as ultrasonic generators, actuators or sensors. They therefore have a wide range of applications in medical engineering. These include micro-dosing pumps and nebulizers to generate homogenous aerosols, sensors for flow measurement, and so-called air-bubble detectors (ABD), also known simply as bubble detectors. Even systems which are energy self-sufficient can be realised.
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