The System Sensor 2151T is a 100-series, combination fixed and rate-of-rise, plug-in heat detector. The 2151 detector offers superb performance and reliability in a sleek, low-profile design. Add the hardwired 2151 heat detector to most existing alarm system control panels.
The 5151 thermal detector meets the needs for applications where rapid response is vital and rapid temperature increases would only be caused by a fire emergency. The detector 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.
Low standby current
Compatible with 400 Series product
Two visible LEDs "blink" in standby and provide a 360° field viewing angle
Detector head plugs easily into base
Built-in test switch
Wide variety of mounting bases with built-in shorting spring
Operating Temperature Range: 32° to 100°F (0° to 38°C)
Operating Humidity Range: 10% to 93% Relative Humidity noncondensing
Operating Voltage: 8.5 to 35VDC
Standby Current: 80µA @ 24VDC
Alarm Current: 10mA Min. 130mA Max. (Must be limited by control panel)
Latching Alarm: Reset by momentary power interruption
Thermal Detector Spacing: On smooth ceilings (as defined in NFPA 72), spacing of 50 feet (2500 sq ft) may be used. Other spacing may be used depending on ceiling height, high air movements, and other conditions or response requirements.
Sensitivity: 135°F (57°C) Fixed or 15°F/min rate-of-rise
Q & A's : System Sensor 5151 Fixed and Rate-of-Rise Heat Detector