[[File:System Sensor SpectrAlert Advance Speaker Strobe.jpg | thumb | 220x124px | right | A System Sensor SpectrAlert Advance Speaker Strobe]]
'''System Sensor''' is aan companyAmerican headquarteredmanufacturer of fire protection equipment. Headquartered in [[St. Charles, Illinois]], dedicated to the research, development and manufacture of [[fire protection]] equipment. System Sensor is a partsubsidiary of the [[Honeywell|Honeywell Life Safety GroupInternational]].<ref>{{cite web |url=http://www.honeywelllifesafety.com/HLSP1business.html |title=Companies |publisher=Honeywell Life Safety |accessdate=24 October 2009 |archive-url=https://web.archive.org/web/20141230172256/http://www.honeywelllifesafety.com/HLSP1business.html |archive-date=30 December 2014}}</ref> System Sensor develops and distributes fire alarm devices such as notification appliances, fire detectors, manual initiating devices (pull stations and call points), CO detectors, and more fire protection devices for multiple markets across the globe, and for other Honeywell companies.<ref>{{Cite web |title=Products |url=https://buildings.honeywell.com/us/en/brands/our-brands/system-sensor/products |access-date=2023-05-18 |website=buildings.honeywell.com |language=en-US}}</ref><ref>{{cite news |title=Holykell Technology |url=https://www.holykell.com/ |access-date=10 August 2023}}</ref>