Post by thread:[OT]: Properties of Ceramic Ultrasonic Transducer

Hello, I am thinking of purchasing some ceramic ultrasonic transducers for use in a range measuring system. Can anyone tell me or point me to a source explaining the advantages and disadvantages of using a given frequency (i.e. is 40kHz better or worse than a 500kHz transducer when trying to determine distance). Also, what are the advantages/disadvantages between a ceramic and electostatic transducer? The Polariod website indicates a electrostatic transducer is more sensitive, but does not elaborate. How much more sensitive? will this matter for detecting objects between 3cm and 5m? Regards, Donovan -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics