System Sensor (a Honeywell company) is the world’s largest dedicated manufacturer of fire detection and notification devices. Their products are found in virtually every brand of fire alarm system as both OEM and aftermarket components. From the ubiquitous SpectrAlert Advance horn/strobe line to the i3 series intelligent detectors, System Sensor fire alarm replacement parts are among the most frequently ordered in the industry.
We stock over 1,100 System Sensor products, covering detectors, notification appliances, bases, duct detectors, and accessories.
System Sensor Product Families
| Product Line | Type | Popular Models |
|---|---|---|
| SpectrAlert Advance | Notification Appliances | P2R, P2RL, PC2R, PC2RL, SR, SRHK, SPSR |
| i3 Series | Intelligent Detectors | i3 Photo, i3 Acclimate, i3 Heat |
| 2W-B / 4W-B Series | Conventional Detectors | 2112/24, 5451, 5601P |
| Duct Detectors | Sampling Detectors | D4120, D4S, DST |
| Bases | Detector Mounting | B401B, B501BH, B110LP, B200S |
Common System Sensor Replacement Parts
SpectrAlert Advance Horn/Strobes
The SpectrAlert Advance series is the most widely installed notification appliance line in North America. Models like the P2R (wall horn/strobe, red), P2RL (wall horn/strobe, red, LED), and ceiling-mount PC2R variants are constantly in demand for replacements and retrofits. We carry both standard and low-frequency models for sleeping area compliance.
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Smoke & Heat Detectors
System Sensor manufactures both conventional and addressable detectors. The 2112/24 and 2151 conventional photoelectric heads remain popular, while the intelligent i3 series offers advanced multi-criteria detection. We also stock the 5551 rate-of-rise heat detector and 5601P fixed-temperature models.
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Detector Bases
Every System Sensor detector requires a compatible base. The B401B standard base, B501BH with built-in horn, and B200S addressable sounder base are the most common. Bulk packs (e.g., B501BP 10-pack) are available for large projects.
Duct Detectors
The D4120 duct smoke detector and its accessories (sampling tubes, relay bases) are essential for HVAC integration. We carry complete duct detector assemblies and individual replacement components.
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Tips for Ordering System Sensor Parts
- Color Matters — SpectrAlert models ending in “R” are red; “W” are white. Ensure you match the existing installation color.
- LED vs. Xenon — Newer “LED” suffix models (e.g., P2RLED) replace older xenon-based strobes with lower current draw.
- Voltage — Most System Sensor devices are 12/24V dual-voltage, but verify before ordering.
- Compatibility — System Sensor products are designed to work with most major fire alarm panels (Notifier, Fire-Lite, Silent Knight, etc.).
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Questions? Call 1-844-839-6844 for expert assistance.