Information on residential smoke alarms as well as smoke detectors from the recognized leader in fire protection equipment testing and certification.

UL - Smoke alarms and smoke detectors


Smoke alarms

Smoke alarms are intended to notify the occupants of the presence of a threatening fire and the need to escape to a place of safety before such escape might be impeded by untenable conditions in the escape path.

  • Certified smoke alarms (UL 217)  Information   Manufacturers
  • Scope of the UL 217 Standard for Single- and Multiple-Station Smoke Alarm  View here
  • Smoke alarm sensitivity calibration article  View here
  • UL smoke alarm recommendations concerning ionization and photoelectric technologies  View here

Research and information on residential smoke alarms


Smoke detectors

Smoke detectors are intended to provide a signal to other equipment as a results of sensing smoke in order to initiate a response to those signals.


Duct smoke detectors

Duct smoke detectors are intended to prevent smoke spread by initiating control of fans, dampers, doors, and other equipment.

  • Certified smoke detectors for use in ducts and special applications (UL 268A)  Information   Manufacturers
  • Scope of the UL 268A Standard for Smoke Detectors for Duct Applications  View here
  • Scope of UL Subject 268B Outline of Investigation for Video Image Smoke Detectors  View here