Duct smoke detectors


Optical smoke detector with automatic sensitivity adjustment and service alarm, for conection to external control unit. For use in ventilation ducts. Free-rotation in any direction.

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The UG8 Uniguard has been developed to measure smoke in ventilation ducts and consists of a smoke detector and duct enclosure system, specially-designed for optimal airflow through the smoke detector.

The UG8 can be mounted on either side of the duct. The UG8 comes a rotating section that, together with your chosen Venturi tube, is mounted on the ventilation duct. It also has a “FLOW arrow” for easy installation in the correct direction for the airflow. The direction of the arrow should correspond with the direction of the airflow in the duct. The patent-pending detector enclosure with cable inputs can be rotated in any direction to suit the characteristics of the mounting location. Both the smoke detector chamber and connection chamber covers have snap locks for quick access.

EVC-PY-DA has an intelligent monitoring circuit that constantly checks and adjusts the sensitivity for optimum functionality throughout its service life. When the detector can no longer compensate for contamination and starts to approach a false alarm, a service alarm will be indicated.

The detector is fitted with a bayonet mount, making it easy to fit and remove.

The UG8 can be used with Calectro’s ST280 and ST580 Venturi tubes, as well as the extension tube ST-EXTEND.


  • Service alarm
  • Automatic sensitivity adjustment
  • Test hole on the cover
  • Easy installation
  • Flow indicator
  • Simple service and maintenance
  • Complete with pre-mounted cable entries

Documentation, software and images


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