[Jewelry making - Article 00459] - Re: [Orchid] What is the value of an ultrasonic?

[Kay Davis]

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    Reference the discussion of if it is dangerous to put your fingers
    in a Ultrasound tank.... 

    The real answer is "it depends" 

    The answer depends on the relative power output of the ultrasonic
    transducer, the distance you are from it, the viscosity of the
    liquid (Note I am not assuming water only), The temperature and the
    duration. 

    Think Radioactivity (In this case gamma Radiation) same idea... Air
    Line pilots are regularly exposed to elevated and easily measured
    levels, is it dangerous, we don't think so. A person working at a
    factory using a Gamma irradiator will be condemned to death in
    moments by the radiation levels. In both cases same radiation, but
    the variables are different. 

    coming back to Ultrasonic cleaners, to be honest I doubt if consumer
    type equipment would be dangerous, even the Jeweler type bench top
    is probably of such low power that the risk is negligible. The larger
    industrial high power units that for example a casting operation
    might invest in to de-invest castings in large batches, dangerous. 

    I would say ask the manufacturer and / or verify the documentation
    you received with the unit, but in today's heavily layered up north
    American environment, you can be sure that the warnings will be more
    to protect a Manufacturer from a person who develops arthritis in
    their 60's claiming that the ultrasound caused it and preventing the
    resulting lawsuit, rather than what the real risk is. (For a laugh
    the most ridiculous warning label I have read about was a "Dangerous
    if swallowed" on a fishing lure with a large 3 tine barbed hook). 

Kay
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