System Sensor 2151 Photoelectric Low-Profile Smoke Detector
Overview
The System Sensor 2151 is a 120VAC photoelectric smoke detector built for retrofit fire alarm installations where a compact, plug-in form factor fits standard outlet locations. This detector addresses the deployment constraint of retrofitting smoke detection into existing buildings without running new hardwire runs — the plug-in design mounts directly into standard receptacles. Photoelectric-type sensing responds to smoldering fires and visible smoke particles, complementing ionization-based detection in multi-detector fire alarm strategies.
Compatibility
The 2151 integrates into fire alarm systems designed for 120VAC photoelectric detectors. Verify that your fire alarm control panel and signaling circuit support plug-in photoelectric detectors before installation. This model is intended as a retrofit accessory for existing 120VAC fire alarm branches, not a hardwired 24VDC installation. Confirm that your building's outlet power is dedicated fire alarm circuit (not shared general-use power) to meet code inspection requirements.
Installation Notes
Mount the detector into a standard 120VAC outlet on a dedicated fire alarm circuit. The low-profile design allows installation in spaces where traditional hardwired detectors would not fit. Ensure the outlet is on a circuit that is supervised and backed up by the fire alarm control panel. Test the detector using the field testing capability specified in the product documentation before commissioning. Because this is a plug-in detector, power loss to the outlet will remove detection capability — ensure the circuit is protected and monitored by your fire alarm system for power supervision compliance.
What's in the Box
- 1x System Sensor 2151 photoelectric smoke detector
