Smokegard Model 720 battery compartment in back. Install per owner's manual 0173-2 and NFPA STD 74 Manufactured by Statitrol Corporation, 140 S Union Blvd, Lakewood Colorado 80228. Contains radioactive material of 1 microcurie Americium 241.
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Statitrol Corporation, "Statitrol Smokegard II Model 720 - back" (1970). MS055-08-0001 - 0003 images. 8.
small business, smoke detectors, fire protection, fire safety