Agency Listings

400 Series Plug-In

Thermal Detectors

System Sensor 400 Series plug-in thermal detectors

meet the performance criteria designated by

Underwriters Laboratories.

Features

• Low standby current

• Two visible LEDs “blink” in standby and provide a 360° field

viewing angle

• Wide variety of mounting bases with built-in shorting spring

• Detector head plugs easily into base

• Built-in test switch

• Field sensitivity metering of detector to meet the requirements

of NFPA 72

• Built-in tamper-resistant feature

• SEMS screws for easy wiring

• Optional recessed mounting

The 5451 thermal detector meets the needs for applications

where rapid response is vital and rapid temperature increases would

only be caused by a fire emergency.

This detector contains a unique dual thermistor heat sensing circuit

that provides maximum performance and solid-state reliability. It

initiates an alarm in response to both rapid rate-of-rise conditions

(increases in excess of 15°F per minute) and fixed heat (135°F). This

enables the heat detector to communicate an alarm to the central

control panel prior to reaching its fixed set point for high rates of

rise, providing a timely response to both rapid and slow temperature

increases.

Additional key features include a recessed mounting option, a variety

of mounting bases, and a full line of optional accessories.

S2101

OB3AO.AY

7270-1653:104