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Multi-sensor smoke detector, ASA

Stock no. S54320-F7-A3

Stock no. S54320-F7-A3

For the detection of flaming fires caused by the combustion of liquid and solid matters, as well as smoldering fires. For reliable fire detection in environments with deceptive phenomena.

Works according to the scattered-light principle with two sensors, optical forward and backward scattering. Opto-electronic sampling chamber blocks disturbing extraneous light but optimally detects both dark and light smoke particles. Two additional heat sensors increase the fire detector’s immunity to deceptive phenomena.

In the collective mode you have the possibility to choose between three parameter sets: Standard Plus (PS1), Suppression (PS5) and High Sensitive Fast (PS9).

The base must be ordered separately.

Scope of delivery

Detector and dust cap




CEA 4021, EN 54-5, EN 54-7,
EN 54-17

Protection category

IP44 with detector base seal RS720

Operating voltage

DC 12...33 V

Operating temperature

-25...+55 °C

Storage temperature

-30...+70 °C

Quiescent current

~170...250 μA

Ext. alarm indicator


System compatibility

C-NET -> FS720

Communication protocol

C-NET or collective/conventional

Relative humidity

≤95 % rel.

Dimensions (Ø x H)

117 x 49 mm (incl. base)


~RAL 9010, Pure white


LP720 Detector locking device