Catalog > System Sensor 5251RB Rate-Of-Rise Therma...

Verified: January 13, 2026

System Sensor 5251RB Rate-Of-Rise Thermal Heat Detector Sensor

~$44.95

The System Sensor 5251RB is a rate-of-rise thermal heat detector sensor designed to quickly detect rapid temperature increases in a space.

Key Specifications

  • Compatibility: Compatible with most fire alarm control panels
  • Temperature Range: 135°F fixed temperature, 15°F per minute rate-of-rise
  • Operating Voltage: 9-32 VDC
  • Current Draw: 60μA standby, 50mA alarm (max)
  • Mounting: Standard electrical box or surface mount
  • Type: Rate-Of-Rise Thermal Heat Detector
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