An improved apparatus for ultrasonic nebulization of liquid samples or suspensions in which the piezoelectric transducer is protected from chemical attack and erosion. The transducer is protected by being bonded to the inner surface of a glass plate which forms one end wall of a first hollow body provided...http://www.google.fr/patents/US4109863?utm_source=gb-gplus-shareBrevet US4109863 - Apparatus for ultrasonic nebulization
