System Sensor 2251BR


Photoelectric smoke detector, remote test capable, for use with DNR(W) duct smoke detectors

Available with Lead Time

  • Factory New
Brand: System Sensor Part #: 047943 Categories: , Manufacturer Part #: 2251BR Tag:


200 Series smoke detectors are intelligent (addressable) detectors with point ID capability that enable each detector address to be set with decade address switches to provide exact detector locations. The sensitivity of 200 Series detectors can be programmed using the control panel software to suit the environment. In addition, detector sensitivity is continually monitored and reported to the panel.

The System Sensor 2251B photoelectric detector’s unique optical sensing chamber is engineered to sense smoke produced by a wide range of combustion sources. Dual electronic thermistors add 135°F fixed temperature thermal sensing on the 2251TB model. The 2251BR is a remote test capable detector for use with DNR(W) duct smoke detectors.


Weight 1.00 lbs
Dimensions 5 × 5 × 5 in

Rotary Dials

Detection Method





  • Sleek, low-profile design
  • Analog communications
  • Low standby current
  • Rotary address switches
  • Superior EMI protection
  • Dual LEDs for 360° visibility


200 Series: Intelligent Low-Profile Plug-In Detectors
Product Flyer: Isolator Load Rating
Installation and Maintenance Instructions: 2251BR Intelligent Photoelectric Smoke Sensor with Remote Test Capability in Duct Applications


There are no reviews yet.

Be the first to review “System Sensor 2251BR”

Related Products...