The NATIONAL TIME Addressable Analog Photo and Ion detectors maintain consistent alarm detection over changing ambient conditions. In collaboration with the FACP, its intelligent self-adjusting drift compensation algorithm provides true alarm threshold levels above the detector's ambient value levels. The powerful DigiComm™ communication protocol enables reliable and accurate information to be exchanged between the detector and the Fire Alarm Control Panel. The detectors feature programmable status LED indicators. In the non- active state, the status LED can be used to determine detector type