A smoke detector is a device that senses smoke, typically as an indicator of fire. Commercial security devices issue a signal to a fire alarm control panel as part of a fire alarm system, while household detectors, known as smoke alarms, generally issue a local audible or visual alarm from the detector itself.
Break Glass unit is an active fire protection device usually wall mounted, that when activated, initates a alarm on a fire alarm system, in its simplest form,the user activates the alarm by pressing the frangible glass element. After operation the device must be restored to the ready position using a special tool or key in order to deactivate the alarm sequence and return the system to normal, standard and weather proof versions available
These units are ideal for use on fire alarm systems,giving both an audible and visual indications that the fire alarm has been activated
An optical beam smoke detector is a device that uses a projected beam of light to detect smoke across large areas, typically as an indicator of fire. They are used to detect fire in buildings where standard point smoke detectors would either be uneconomical or restricted use by the height of the building