System Sensor products
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System Sensor
SKU: MDL3R
System Sensor MDL3R 12/24V Sync-Circuit Module
Dual-voltage sync module with TCP/IP for networked fire alarm coordination
- Operates at 12V or 24V DC, eliminating power supply changes during retrofits.
- TCP/IP connectivity enables remote monitoring of alarm signals across networked zones.
- Synchronization circuit prevents signal overlap across multi-zone notification devices.
$141.78 $90.99 Save $50.79The item has been added -
System Sensor
SKU: LENS-BC
System Sensor LENS-BC Blue Lens Replacement Assembly for SpectrAlert Advance
Blue lens replacement for SpectrAlert Advance ceiling units, 35VDC
- Direct drop-in replacement for SpectrAlert Advance ceiling units—no rewiring required.
- Operates on the existing 35VDC power rail, eliminating additional power supply runs.
- TCP/IP integration enables centralized monitoring and synchronized activation across units.
$29.93 $19.99 Save $9.94The item has been added -
System Sensor
SKU: EOLR-1
System Sensor EOLR-1 End-of-Line Power Supervision Relay
End-of-line relay detects open/short circuits in fire alarm branches
- Detects open and short circuits at branch termination, reporting faults to the panel instantly.
- Monitors power continuity on supervised branches to flag voltage loss before detectors are affected.
- Compatible with conventional and hybrid addressable/conventional architectures for flexible deployment.
$36.38 $28.99 Save $7.39The item has been added -
System Sensor
SKU: DH400OE-1
System Sensor DH400OE-1 Weatherproof Outdoor Duct Detector Enclosure
Sealed outdoor duct detector enclosure for rooftop HVAC smoke detection
- Weatherproof sealed housing blocks rain, snow, dust, and UV for outdoor HVAC installs.
- Compact 14.38 × 5 × 2.5 in footprint fits wall, ceiling, or rack mounting on rooftop ducts.
- Operates at 29 VDC with no gateway hardware needed for standard fire alarm integration.
$618.14 $389.99 Save $228.15The item has been added -
System Sensor
SKU: D4S
System Sensor D4S 4-Wire Duct Smoke Detector
4-Wire duct smoke detector with TCP/IP network connectivity for HVAC monitoring
- Operates at 29VDC, matching standard fire alarm panel power supplies with no external converter.
- TCP/IP connectivity enables real-time network alerts alongside hardwired 4-wire panel signaling.
- Rated for –20 to 70°C operation, supporting reliable HVAC duct deployment across harsh environments.
$245.29 $151.99 Save $93.30The item has been added -
System Sensor
SKU: D4120W
System Sensor D4120W 4-Wire Watertight Duct Smoke Detector
4-wire duct detector with NEMA 4 watertight housing for humid HVAC environments
- NEMA 4 watertight enclosure blocks moisture and dust, preventing false alarms in high-humidity ductwork.
- Separate 4-wire alarm and supervisory circuits let HVAC shutdown logic run independently from audible alarms.
- 29VDC hardwired operation integrates directly into conventional fire alarm panels—no protocol converters needed.
$505.70 $315.99 Save $189.71The item has been added -
System Sensor
SKU: D4120
System Sensor D4120 4-Wire Photoelectric Duct Smoke Detector
4-wire photoelectric duct detector, 24 VDC, direct mount to HVAC
- Photoelectric sensing targets smoldering-fire smoke particles before spread through HVAC zones.
- 4-wire, 24 VDC design integrates with conventional and addressable fire alarm control panels.
- IP66-rated housing mounts directly into standard ductwork at 14.38 × 5 × 2.5 in footprint.
$375.14 $235.99 Save $139.15The item has been added -
System Sensor
SKU: D2
System Sensor D2 2-Wire Photoelectric Duct Smoke Detector
Photoelectric duct detector, 2-wire conventional, 29VDC for HVAC systems
- Photoelectric sensing reliably detects smoldering fires in HVAC ductwork.
- 2-wire circuit cuts conduit runs—power and signaling share one wire pair.
- 29VDC operation integrates with legacy and modern panels without added modules.
$303.00 $156.99 Save $146.01The item has been added -
System Sensor
SKU: COSMO-4W
System Sensor COSMO-4W 4-Wire Combination CO/Smoke Detector with Sounder
4-wire combo CO/smoke detector with built-in sounder for conventional panels
- Combines CO and ionization smoke detection in one unit, reducing loop device count.
- Built-in sounder eliminates separate notification appliance wiring at each install point.
- 35VDC 4-wire design integrates directly with conventional fire alarm control panels.
$223.86 $143.99 Save $79.87The item has been added -
System Sensor
SKU: COSMO-2W
System Sensor COSMO-2W i4 Series 2-Wire CO/Smoke Detector with Sounder
Dual smoke/CO detector on single 2-wire loop with integrated sounder
- Photoelectric smoke and electrochemical CO sensing share one 2-wire loop address.
- Integrated sounder eliminates external horn modules, reducing device count per zone.
- Mounts to 3.5"/4" octagonal, single-gang, 4" square, or round ceiling boxes.
$220.64 $139.99 Save $80.65The item has been added -
Add to Cart The item has been addedSystem Sensor
SKU: B114LP
System Sensor B114LP 120VAC Low-Profile Plug-In Detector Base
Low-profile 120VAC plug-in base with TCP/IP networking for confined spaces
- Runs on 120VAC building power, eliminating separate low-voltage supply infrastructure.
- TCP/IP connectivity enables direct network integration without proprietary polling loops.
- Low-profile form mounts on 4-inch square/octagon box (1.5-inch min depth) for tight spaces.
$268.99The item has been added -
System Sensor
SKU: A77-AB2
System Sensor A77-AB2 Retrofit Adapter Bracket for i3 Series
TCP/IP retrofit adapter bracket for System Sensor i3 Series fire panels
- Designed for i3 Series panels, ensuring mechanical and electrical compatibility out of the box.
- Rated for 35VDC operation, matching standard fire alarm power architectures without extra regulation.
- Mounts to a 3½-inch octagonal back box; fits wall, ceiling, or rack deployments.
$12.92 $8.99 Save $3.93The item has been added -
System Sensor
SKU: 5604
System Sensor 5604 194F Fixed Temperature Mechanical Heat Detector
Fixed temperature heat detector for conventional 2-wire fire alarm systems
- Operates on 35VDC conventional 2-wire loops—no addressable module or converter needed.
- Box form factor supports ceiling or wall mounting in warehouses and mechanical rooms.
- Mechanical thermal element requires zero calibration or configuration post-installation.
$30.98 $21.99 Save $8.99The item has been added -
System Sensor
SKU: 5601P
System Sensor 5601P 135F Fixed/Rate-of-Rise Mechanical Heat Detector
Dual-mode 135°F mechanical heat detector for two/four-wire fire loops
- Dual fixed-temperature (135°F) and rate-of-rise detection reduces nuisance alarms.
- Runs on 35VDC across two-wire or four-wire fire alarm circuits for flexible integration.
- Electronics-free mechanical design eliminates firmware dependencies and processor latency.
$30.45 $21.99 Save $8.46The item has been added -
Add to Cart The item has been addedSystem Sensor
SKU: 4WTR-B
System Sensor 4WTR-B 4-Wire Addressable Photoelectric Smoke Detector
4-wire addressable photoelectric smoke detector for networked fire systems
- Addressable 4-wire loop gives the control panel exact detector-level alarm location.
- Photoelectric light-scattering detects smoldering smoke early on 24VDC loop power.
- NFC 13.56 MHz enables credential-based configuration without removing the detector.
$130.20 $84.99 Save $45.21The item has been added -
System Sensor
SKU: 4WTA-B
System Sensor 4WTA-B 4-Wire Photoelectric Smoke Detector
4-wire hardwired photoelectric smoke detector for 24 VDC fire systems
- Runs on 24 VDC panel supply — no added converters or external power sources required.
- NFC 13.56 MHz enables secure on-device commissioning without network or cloud access.
- Mounts to a 3½-inch octagonal back box on wall or ceiling; 5.3 in. diameter footprint.
$122.85 $79.99 Save $42.86The item has been added -
System Sensor
SKU: 4WT-B
System Sensor 4WT-B 4-Wire Addressable Photoelectric Smoke Detector
4-wire addressable photoelectric smoke detector with NFC programming
- Addressable 4-wire architecture lets each detector carry a unique address, cutting zone wiring runs.
- 35VDC operation aligns with standard fire control panels, simplifying power distribution planning.
- Photoelectric sensing reduces false alarms in kitchens and parking structures vs. ionization types.
$103.95 $65.99 Save $37.96The item has been added -
System Sensor
SKU: 4W-B
System Sensor 4W-B Photoelectric Smoke Detector
4-wire photoelectric smoke detector for hardwired fire alarm systems
- 4-wire circuit separates power and signal, reducing false alarms in electrically noisy spaces.
- 35VDC operation matches standard FACP output—no external power conversion or added components.
- Mounts to a 3½-inch octagonal back box; fits wall or ceiling in 0°C–49°C environments.
$96.60 $61.99 Save $34.61The item has been added -
Add to Cart The item has been addedSystem Sensor
SKU: 2WTR-B
System Sensor 2WTR-B i3 Series Photoelectric Smoke Detector
Photoelectric smoke detector with TCP/IP networking and 35VDC operation
- Photoelectric sensing reduces nuisance alarms from dust and cooking smoke.
- TCP/IP communication integrates directly into existing Ethernet infrastructure.
- 35VDC operation simplifies retrofits; mounts to standard 3½-inch octagonal back box.
$123.90 $78.99 Save $44.91The item has been added -
System Sensor
SKU: 2W-B
System Sensor 2W-B Photoelectric Smoke Detector 24VDC
24VDC photoelectric smoke detector with 2-wire supervised circuit
- 2-wire supervised circuit cuts cable runs and conduit costs on large floor plates.
- 24 VDC operation integrates directly into standard building fire alarm power buses.
- Photoelectric sensing targets smoldering fires, reducing false alarms in kitchens and mechanical rooms.
$86.63 $52.99 Save $33.64The item has been added
