Silent Knight SD505-AHS Category : Silent Knight This is an analog heat detector. Brand Silent KnightModel SD505-AHSManufacturer Silent KnightType Heat Detector
Simplex 4903-9101 Category : SimplexSince this is a ceiling-mount unit, it’s model number is probably different from 4903-9101, but I couldn’t figure out what...
GE 521BXT Category : GEI think that this smoke detector might be intended for use in security systems.