There's an infrared sensor that detects the temperature difference between an animal and the background. When it senses an animal, it turns on a sprinkler (the ka-chunk, ka-chunk kind) for about 3 seconds.
Since I probably qualify as a large animal, I sacrificed my dry clothes for a field test of the installation. Seemed to work just fine. We'll let you know the fate of Sue's remaining hosta.
Chet
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