D4120		System Sensor 4-wire low flow smoke detector photo electric type
D4S		System Sensor 4-wire photo electric sensor for D4120
DH100ACDCLP	System Sensor smoke detector photo electric type
DST3		System Sensor 3' sampling tube for D4120 smoke detector
DST5		System Sensor 5' sampling tube for D4120 smoke detector
PS24LOW		System Sensor Mini-Alert Add-on Strobe for PA400W or SSK451
RTS151KEY	System Sensor remote test station with key
RTS2-AOS	System Sensor remote test with add on strobe
RTS451KEY	System Senor key activated remote test & reset station for DH100ACDCI
SSK451		System Sensor multi-signaling accessory for DH100ACDC
ST-3		System Sensor 3' sampling tube for DH100ACDCI smoke detector
ST-5		System Sensor sampling tube for DH100ACDCI 4' to 8' ducts