Silent Knight SD505-APS This smoke detector is conventional. Brand Silent KnightModel SD505-APSManufacturer Silent KnightType Smoke Detector
EST 882-2B Category : EST/EdwardsThis unit has an electronic horn rather than an electromechanical mechanism.
Simplex 4098-9830 Category : SimplexThe LED on this unit uses 14VDC rather than the 24VDC used by the Simplex 2098-9806.
Simplex/Standard 4080 Category : Simplex, StandardI’m not sure if this is actually a Simplex bell or a Standard bell. Although it’s labeled as Standard on...