Combination Detectors
Combination detectors pair smoke and carbon monoxide (CO) sensing in a single, space-saving unit to protect homes and buildings. Ideal for property managers, contractors, and facility teams, these devices simplify installation and maintenance while delivering reliable life-safety alerts. Choose from hardwired, battery-powered, and smart-connected models with interconnect capability, UL-listed certification, and battery backup to meet safety codes and reduce risk.
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Silent Knight by Honeywell
Silent Knight SK-PHOTO-T-W Intelligent Photoelectric Smoke Detector and Temperature Sensor
SK-PHOTO-T-W
In Stock
$111.47
Silent Knight by Honeywell
Silent Knight SK-PTIR-W Multi-Criteria Detector, White
SK-PTIR-W
In Stock
$125.56
System Sensor
System Sensor 2WTA-B Photoelectric i3 Series Smoke Detector, 2-Wire with Thermal Sensor and Built-In Sounder, White
2WTA-B
In Stock
$72.53
System Sensor
System Sensor 2WT-B Photoelectric i3 Series Smoke and Heat Detector, 2-Wire, 135F Fixed Thermal Sensor, White
2WT-B
In Stock
$67.63
System Sensor
System Sensor 2WTR-B Photoelectric i3 Series Smoke Detector, 2-Wire, Thermal Sensor, Form Relay, White
2WTR-B
In Stock
$82.33
System Sensor
System Sensor 4WITAR-B Photoelectric i3 Smoke Detector with Isolated Thermal Sensor, 4-Wire, Built-in Sounder, Form Relay, White
4WITAR-B
In Stock
$97.16
System Sensor
System Sensor 4WTA-B Photoelectric i3 Series Smoke Detector, 4-Wire, with Thermal Sensor and Built-In Sounder, White
4WTA-B
In Stock
$81.00
System Sensor
System Sensor 4WTAR-B Photoelectric i3 Series Smoke Detector, 4-Wire, Thermal Sensor, Built-In Sounder, Form Relay, White
4WTAR-B
In Stock
$89.68
System Sensor
System Sensor 4WT-B Photoelectric i3 Series Smoke Detector, 4-Wire, 135F Fixed Thermal Sensor, White
4WT-B
In Stock
$75.61
System Sensor
System Sensor 4WTR-B Photoelectric i3 Series Smoke Detector, 4-Wire, Thermal Sensor, Form Relay, White
4WTR-B
In Stock
$85.57
System Sensor
System Sensor COSMO-2W i4 Series, 12/24V, 2-Wire, System-Connected, Combination Carbon Monoxide/Smoke Detector with RealTest Technology
COSMO-2W
In Stock
$146.51
System Sensor
System Sensor COSMO-4W i4 Series, 4-Wire CO and Smoke Combination Detector
COSMO-4W
In Stock
$159.36
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