System Sensor D4120W 4-Wire Photoelectric Duct Smoke Detector, Watertight

The SYSTEM-SENSOR-D4120W watertight 4-wire photoelectric 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 superior false alarm immunity. These features, plus a NEMA 4 rating, allow operators to mount the detector to rooftop HVAC equipment or use the detector in other harsh environments.

The D4120W provides unsurpassed environmental protection while simplifying installation, testing, and maintenance. The unit features a pivoting housing that fits various applications: both square and rectangular footprints mount to round or rectangular ductwork.

UPC: 783863034541
Also known as: BK-D4120W

Technical Specifications: Alarm auxiliary contacts: (DPDT) ¼ HP @ 120 VAC Alarm initiation contacts: (SPST) 2.0A @ 30 VDC (resistive) Max. alarm current: 35 mA RMS @ 120VAC 60 Hz Max. standby current: 20 mA RMS @ 120VAC 60 Hz Alarm response time: 15 sec. Power up time: 35 sec. max. Reset time: (by power down) 0.6 sec. max. Reset time: (with RTS151) .03 to 0.3 sec. Reset Voltage: 10 VAC min Power Supply Voltage: 120 VAC, 50-60 Hz NEMA Enclosure Rating: Type 4 – Watertight Indoor/Outdoor Air Duct Velocity: 100 to 4000 ft/min (0.5 to 20.32 m/sec) Weight: 2.5 lbs (1.14 kg) Square Dimensions: 7.75 in (19.7 cm) Length; 9 in (22.9 cm) Width; 2.5 in (6.35 cm) Depth Rectangular Dimensions: 14.38 in (37 cm) Length; 5 in (12.74 cm) Width; 2.5 in (6.36 cm) Depth

For more information about the System Sensor D4120W, please contact us.