At 02:24 PM 10/28/2003 -0500, Robert Mash wrote:

>I've been in a public restroom that has an automatic air freshener.  Next
>time i'm there i'll look at how it knows to actuate.  It sprays a bit of
>smell good stuff occasionally, but I don't know what it uses for sensory
>input.

Most are just on a timer.

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