Duct Detectors - overview of models

[Leo]

..System Sensor conventional
D4120......4Wire
D4120W.....OUTSIDE
D4S........Smoke,smoke side only
D4P120.....contoller,Power Board Only
D2....2wire duct, no one uses

..System Sensor addressable
SK-Duct...Silent Knight
D355PL....FireLite
DNR.......housing only
DNRW......housing only,OUTSIDE


Hochiki addressable
SD505DUCT...Silent Knight
SD505DUCTR..Silent Knight,With relay $170 RELAY
DH-99-A.....Hochiki...without relay trash
DH-99-AR....Hochiki, relay


Air Products Conventional.. only company with ION smk
SL-2000-P......4wire..photo
SL-2000-N......4wire..ION
SM-501.........4wire..ion/photo...low grade
HS-100-P.......smk only, not mounted in housing...Plenum,air shafts
HS-100-N.......ION

SuperDuct Series addressable
FX-PDD...FireWorX
EST Siga-SD

SuperDuct Series Conventional
SD-2W...2wire
SD-4W...4wire