Knight Series® FC-40 Level and Temperature Alarm System

The FC-40 monitors cisterns or reservoirs that supply water for a building’s fire sprinkler system and water containment tanks. It provides a continuous level and temperature information on the panel and dry contacts that connect to the fire panel monitoring system. The FC-40 is ideal for applications where there is a risk of freezing temperatures. The alarm and monitoring features provided meet fire codes and standards for cisterns and fire sprinkler systems.


  • UL Listed for the United States and Canada
  • System indicates in the event of temperature below 40°F, low liquid level, or power loss
  • Complete panel remote monitoring dry contacts (below 40°F, low level or power loss) that are able to connect to fire panel or building management systems
  • Temperature monitoring LCD display with adjustable alarm settings
  • Includes stainless steel temperature sensor
  • Includes low-level float with 20’ SJOW cord and mounting clamp
  • Battery backup in the event of power loss
  • Indoor/Outdoor NEMA 4X panel enclosure: heavy-duty polycarbonate with stainless steel lockable latches
  • System has adjustable temperature set points


  • Cisterns/Tanks
  • Fire sprinkler systems
  • Applications that require a level and temperature monitoring
  • Above and below ground containment tanks
Models: Voltage:
FC-40 120VAC, 60Hz.
FC-40-A 208/240VAC, 50/60Hz.

Custom Options:

  • PC = 10' power cord
  • HH = High-level alarm circuit
  • C = Additional cord length greater than 20': Specify after C. Example: (FC-40-C50) indicates 50' cable length for low-level narrow angle float and temperature sensor.
  • If additional options are required, contact the factory at 888-733-9283 to discuss your requirements
Get in Touch: 888-733-9283