System Sensor 5151 Combination Fixed and Rate-of-Rise Plug-in Heat Detector

For environments where early, dependable heat detection is critical, the System Sensor 5151 Combination Fixed and Rate-of-Rise Plug-in Heat Detector delivers fast, application-focused protection. This System Sensor heat detector responds to both a fixed temperature of 135°F and rapid temperature increases (rate-of-rise in excess of 15°F per minute), giving facilities monitoring and security teams timely alarms for both slow-developing and fast-starting fires. The 100 Series plug-in head design simplifies installation and maintenance, while low standby current preserves panel capacity and lowers operating costs. Two visible LEDs provide a full 360° viewing angle for quick status checks during routine surveillance and security inspections, and the built-in test switch streamlines on-site verification and code compliance. Ideal for locations not suited to smoke detectors—mechanical rooms, garages, boiler rooms, and industrial storage—the 5151 integrates seamlessly with standard mounting bases and accessory options for flexible system design. Protect critical assets and improve response times: add the System Sensor 5151 to your fire detection strategy or contact us for compatibility guidance.

• Dual-mode protection: detects both fixed temperature (135°F) and rapid rate-of-rise (>15°F/min) to deliver faster, more reliable fire response.
• Plug-in, low-profile design: simplifies installation and replacement to minimize downtime and labor costs.
• Low standby current: reduces load on fire panels and supports larger system layouts with lower maintenance overhead.
• High-visibility LEDs: two LEDs provide 360° status indication for quick visual inspection during routine monitoring.
• Built-in test switch: enables fast on-site functional checks and simplifies compliance testing.
• Broad compatibility: works with a wide range of mounting bases and accessories for flexible deployment in mechanical rooms, warehouses, and other heat-prone areas.