FAP-420/FAH-420 Automatic Fire Detectors LSN improved version
Combination of optical, thermal and chemical
sensors with intelligent evaluation electronics.
Earliest detection of lightest smoke (TF1 & TF9)
with the double-optical smoke detectors featuring
Dual-Ray technology
Detector properties adapted to cater for room usage
Drift compensation in optical and gas measurement
section
Maintains LSN loop functions in the event of wire
interruption or short-circuit thanks to two integrated
isolators
http://resource.boschsecurity.com/documents/FAP_420_FAH_420_Data_sheet_enUS_1257485707.pdf
