Do the First Alert Wireless Interconnect alarms use photoelectric smoke sensor technology?

Yes, the First Alert Wireless Interconnect alarms use photoelectric smoke sensors. Photoelectric sensor technology is more nuisance resistant around kitchens and bathrooms, which traditionally are more prone to nuisance alarms from cooking smoke and steam from showers. Some areas of the country require photoelectric alarms near high nuisance areas like kitchens and bathrooms.