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On Tue, 16 May 2000, Tony Wayne wrote:
*** Background ***
Here a brain stumper. Florists and nurseries are now selling this little
device called a mist maker.
Ah, "ultrasonic nebulizers". I love those things.
When people use polluted water, or if they let the humidifier sit around
for months so that bacteria grows in the water-well, the humidifier spews
water droplets which evaporate, leaving behind a cloud of infectious
particles. This is how Legionnaires disease was discovered: a humidifier
in a hotel's heating system caused an outbreak. Staphlococcus is pretty
common, so its a good idea to always use new tapwater when operating these
devices (and maybe put in a small bit of Clorox.)
I once measured the frequency of an old humidifier. It ran at about
1.5MHz, if I recall.