Notifier CPX-551 Category : Notifier This is an ionization smoke detector. Brand NotifierModel CPX-551Manufacturer System SensorType Smoke Detector
Simplex 2901-9840 Category : SimplexBesides its appearance, this horn is just like the more common Simplex 2901-9838.
Simplex 4904-9137 Category : SimplexThis is, in fact, a Simplex 4904-9137. It’s just missing its housing.
