System Sensor 5604


Mechanical Heat Detector; Single Circuit, 194°F (90°C), Fixed Temperature

Availability: Estimated 6 Weeks

Condition: New
Brand: System Sensor
Status: Active
SKU: 9952
Manufacturer Part #: 5604


The 5600 series offers a full line of configurations to accommodate a broad range of applications. Both single- and dual-circuit models are available for low- and high-temperature ratings with either fixed temperature or combination fixed temperature/rate-of-rise (ROR) activation. The ROR element of the fixed/ROR models is restorable to accommodate field-testing.

To satisfy a variety of installation needs, the 5600 series easily mounts to single-gang and octagonal back boxes. And these models accommodate four-square back boxes when used with a square to round plaster ring. The reversible mounting bracket permits both flush- and surface-mount back box installations.

The 5600 series provides clear markings on the exterior of the unit to ensure that the proper detector is being used. Alphanumeric characters identify the activation method, as well as the temperature rating, in Fahrenheit and Celsius degrees. Fixed temperature models are identified as FX, while combination fixed/rate-of-rise units are marked as FX/ROR. The 5600 series also provides a post-activation indicator in the form of a collector. When the detector is activated, the collector drops from the unit, making it easy to identify the unit in alarm.

Additional information

Weight 0.2 lbs

Terminal Type

Screw Terminals

Thermal Rating




Detection Method

Fixed Temperature


Production Status



  • Multiple configurations for installation:
    • Single- and dual-circuit models
    • Fixed temp and combination fixed- temp/rate-of-rise 135°F or 194°F ratings.
  • Plain housing for residential installations (Model 5601P)
  • Easy-to-use terminal screws
  • A broad range or back mounting options:
    • Single gang
    • 3.5″ and 4″ Octagonal
    • 4″ square with square to round plaster ring
  • Reversible mounting bracket


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5600 Series: Mechanical Heat Detectors


System Sensor - Data Sheet