Notifier FPTI-951 Multicriteria Smoke Detector (White)The Notifier FPTI 951 is a plug in intelligent addressable multicriteria detector for Notifier SLC loops using FlashScan protocol. This detector reduces false alarms and is more effective at detecting fires with its three sensors: photoelectric sensor to detect smoke, thermal sensor to detect heat and rate of rise with a 135F fixed temperature threshold, and an infrared sensor (PTIR) to evaluate light patterns. It replaces the legacy FAPT 851 Series.