Smoke detector circuit board. | |||
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Smoke detector circuit board. The circuit board inside a cheap hardware store ionization type smoke detector, with the ionization chamber removed so you can see the americium button inside. Source: Hardware Store Contributor: Theodore Gray Acquired: 1 May, 2009 Text Updated: 2 May, 2009 Price: $3 Size: 3" Purity: <1% | |||
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