Description

In general, the System Sensor D4120 4-wire photoelectric, low-flow, duct smoke detector senses smoke in the most challenging conditions, operating 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). A plug-in sensor head offers improved false alarm immunity and simple installation, testing, and maintenance.

With its 2:1 sensor-to-power capability, the power board of the D4120 may be use to monitor a second sensor, D4S, simultaneously (i.e., supply and return side). As many as 50 InnovairFlex detectors can be interconnect. When one unit senses smoke, all interconnected detectors will switch their relays; only the detector sensing smoke will go into alarm, thus pinpointing the fire source.

The System Sensor D4120 features a pivoting housing that fits both square and rectangular footprints and mounts to round or rectangular ductwork. The unit is equip with a cover design isolates the sensor head from the low-flow feature for simple maintenance.