Fire Protection Equipment System Sensor 2251B addressable smoke

2251b System Sensor. System Sensor 2251B Fire Alarm Smoke Detector NIB on PopScreen Dual electronic thermistors add 135°F fixed temperature thermal sensing on the 2251TB model Note: 2251B is listed for use inside DNR(W) duct smoke detectors

System Sensor 2251 is a plug-in type smoke sensor that combines a photoelectronic sensing chamber with addressable-analog communications In low air flow applications with smooth ceilings, space sensors 30 feet apart.

System Sensor 2251b Fire Alarm Smoke Detector (783863021015) for sale

The 2251BR is a remote test capable detector for use with DNR(W) duct smoke detectors. Models 2251B, 2251TB and 2251TMB are plug-in type smoke sensors that com­bine a photoelectronic sensing chamber with addressable-analog communica­tions See Duct Applications Guide A05-1004-XX for details on pendant mount applications

2251B Smoke Detector by SYSTEM SENSOR. The System Sensor 2251B photoelectric detector's unique optical sensing chamber is engineered to sense smoke produced by a wide range of combustion sources Smoke Detector Application Guide, available from System Sensor

System Sensor 2251B, Smoke Detector Head Only. Photoelectric. In low air flow applications with smooth ceilings, space sensors 30 feet apart. Duct Applications: 2251B and 2251TB are listed for use in ducts