Sounders are the audible half of fire alarm notification — the devices that produce the evacuation tone. They appear in conventional and addressable form, in wall and ceiling mount, and in indoor and weatherproof housings.
Two things drive selection. Sound output has to overcome the ambient noise of the space, so a plant floor needs a different device than an office corridor. Tone pattern matters for code compliance: many jurisdictions require a specific temporal pattern for evacuation, and some now require low-frequency output in sleeping areas because it wakes occupants more reliably.
Addressable sounders draw power and control from the loop; conventional ones need a notification circuit sized for the total load. Check the panel's available current before adding devices to an existing circuit.
Apollo 55000-279APO XP95 Open-Area Multi-Tone Sounder - White Body
Apollo 55000-278APO XP95 Open-Area Multi-Tone Sounder - Red Body
Apollo 55000-274APO XP95 Open-Area Multi-Tone Sounder - Outdoor - Red Body
Apollo 55000-041USA XP95A OpenArea Sounder Red Body Isolating
Apollo 55000-018APO AlarmSense Open-Area Sounder - Red Body
Apollo 55000-017APO AlarmSense Open-Area Sounder VID - Red Body (Red Flash)
Apollo 55000-005APO XP95 Open-Area Sounder VID - Red Body (Red Flash) - Isolating
Apollo 55000-001APO XP95 Open-Area Sounder - Red Body - Isolating
Apollo 29600-323 Conventional OpenArea Sounder VID Red Body Red Flash
System Sensor HGRL-LF-BP10 Low-Frequency Compact Sounder, Pack of 10
System Sensor HGWL-LF-BP10 Low-Frequency Compact Sounder, Pack of 10
