Edwards Signaling EC20RRU-3

Low-profile Plug-in Rate-of-Rise Heat Detector

Condition: New
Brand: Edwards Signaling
Status: Obsolete
SKU: 38176
Manufacturer Part #: EC20RRU-3


The EC Series of low-profile plug-in smoke and heat detectors measure-up to the quality and performance standards that have made EST fire detection products the industry’s best price performance buy available today. Meticulously engineered to deliver high-performance features, superb reliability, and unbeatable quality, the EC Series is a low-cost solution for conventional detection applications.

The EC20RRU-3 also has an alarm threshold of 135° F (58° C), but it incorporates an advanced rate compensation sensing element that causes the detector to become more sensitive when an increase in the rate of temperature rise is detected.

Additional information

Weight 0.2 lbs
Dimensions 4.65 × 4.65 × 2.40 in


Material Qualities

Fire Retardant, High Impact Resistance


Thermal Rating


Production Status


Detection Method

Fixed Temperature, Rate-of-Rise



  • Rate-compensated technology
    Reduces the effects of thermal lag that slows the response of standard rate-of-rise and fixed temperature detectors.
  • At-a-glance alarm indication
    An on-board high-intensity LED glows bright red when the unit is in alarm, making response a simple and straightforward operation.
  • Non-polarized
    Simplifies installation of field wiring.
  • Simple to install, difficult to vandalize
    Twist-and-lock design saves installation and maintenance time. Field-configurable locking mechanism prevents unauthorized removal.
  • Flexible mounting options
    Compatible standard base mounts to 1-gang, 4” octagonal, BESA, or European single-gang boxes.
  • Attractive appearance with clean, modern lines
    Low-profile design blends easily with surroundings, extending less than 2 1⁄2” (61 mm) from the ceiling, including base.


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EC Series Smoke and Heat Detectors


EST - Data Sheet