The System Sensor 2151 is a commercial smoke detector designed for use with compatible conventional fire alarm systems. Its low-profile design and advanced smoke sensing chamber provide dependable smoke detection while minimizing nuisance alarms caused by common environmental conditions.
The detector features dual status LEDs, plug-in installation, tamper-resistant capability, removable insect screening, and built-in magnetic testing for simplified maintenance and reliable long-term performance. This product is intended exclusively for commercial fire alarm installations.
Product Functions
- Detects airborne smoke
- Initiates fire alarm conditions through a compatible control panel
- Provides continuous smoke monitoring
- Dual LED status indication
- Magnetic functional testing
- Supports remote LED annunciation
- Simplifies routine inspection and maintenance
Electrical & System Information
The System Sensor 2151 is a conventional smoke detector designed for use with compatible detector bases and listed conventional fire alarm control panels. Operating characteristics depend on the selected mounting base, allowing installation in various 2-wire or 4-wire system configurations.
The detector incorporates a low-current sensing circuit, removable smoke chamber screen, and built-in test switch to support reliable operation and simplified servicing.
Features
- Commercial smoke detector
- Low-profile housing
- Photoelectric smoke sensing
- Dual 360° visible LEDs
- Plug-in detector design
- Built-in magnetic test switch
- Tamper-resistant feature
- Removable insect screen
- Remote LED annunciator compatibility
- Stable performance in high air velocities
Mounting & Design
The 2151 installs onto compatible System Sensor detector bases using a plug-in design that allows quick installation, cleaning, testing, and replacement without disturbing field wiring.
The detector mounts to standard electrical boxes through the selected compatible base and includes a removable cover for routine maintenance.
Protection & Applications
Suitable for:
- Office Buildings
- Schools
- Hospitals
- Hotels
- Retail Facilities
- Warehouses
- Government Buildings
- Industrial Facilities
- Commercial Properties
Compatibility
Compatible with:
- Conventional Fire Alarm Control Panels
- B110LP Detector Base
- B112LP Detector Base
- B114LP Detector Base
- B114LPBT Detector Base
- B116LP Detector Base
- B401 Detector Base
- RA400Z Remote LED Annunciator
- SENS-RDR Sensitivity Reader
Always verify compatibility with the installed fire alarm control panel, detector base, and project requirements before installation.
Technical Specifications
Manufacturer: System Sensor
Parent Company: Honeywell
Model: 2151
Product Type: Commercial Smoke Detector
Detection Method: Photoelectric Smoke Sensing
Sensitivity: 1.0–3.18% Obscuration per Foot
Typical Standby Current: 120 µA (with compatible B110LP base)
Status Indicators: Dual LEDs with 360° Visibility
Testing: Built-In Magnetic Test Switch
Remote Annunciator: Supported
Construction: Low-Profile Plug-In Design
Operating Temperature: 32°F to 100°F (0°C to 38°C)
Operating Humidity: Up to 95% RH, Non-Condensing
Mounting: Compatible System Sensor Detector Base Required
Application: Indoor Commercial Fire Alarm Systems
Listings: UL, ULC, FM, CSFM, and MEA (application dependent).
Applications
The System Sensor 2151 is designed for commercial fire alarm systems requiring dependable smoke detection in open-area applications. Typical installations include office buildings, schools, hospitals, hotels, retail facilities, warehouses, government buildings, industrial properties, and other commercial occupancies where compatible conventional fire alarm systems are installed.



