NIB! SYSTEM SENSOR D4240 4-WIRE DUCT SMOKE DETECTOR HONEYWELL TC804D1009 or either normally open or

or either normally open or normally closed security devices

— 6500-SMK: Surface-mount kit (required when using 6500-MMK to mount transmitter/receiver)

— RA400Z(A): Remote LED annunciator

these detectors are designed to provide open area protection and to be used with compatible UL-listed control panels only

As a result

NIB! SYSTEM SENSOR D4240 4-WIRE DUCT SMOKE DETECTOR HONEYWELL TC804D1009 or either normally open orThe System Sensor D4240 4 wire photoelectric duct smoke detector features a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. Also, this unit operates in airflow speeds of 100 to 4,000 feet per minute, temperatures of 4F to 158F, and a humidity range of 0 to 95 percent (non condensing). Besides, a plug in sensor head offers improved false alarm immunity and simple installation, testing, and