Kidde-Fenwal 27120-0 225°F 24/12 which means that it detects

which means that it detects fire at the earliest possible stage and reliably measures very low to extremely high concentrations of smoke

Compatible with 10/100BaseT networks

NC750SD 2014-2019 (Engine Filter)

And field-configurable for one of the four-candela intensities

— GSA-IB Detector Mounting Base w/Fault Isolator

Kidde-Fenwal 27120-0 225°F 24/12 which means that it detectsDETECT A FIRE (D A F) thermal detectors are UL Listed and FM Approved detection and release devices for use with fire detection systems to activate alarms and extinguishing systems. This Rate Compensated device combines the best features of both fixed temperature and rate of rise detectors.