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Open-area Smoke Imaging Detection (OSID) Receiver Unit with 80 ° coverage. A technological innovation in the field of linear optical detection. OSID uses a double light beam with two different wavelengths and a sensitive element capable of a wide "visual field": these features give the detector high operational reliability as well as simplify installation and alignment phases. Minimum detection cover 6m. And maximum 34m. Three alarm thresholds. The receiver (imager) is able to detect the attenuation caused by the presence of smoke particles on two different light beams emitted by one or more emitters (up to 7) located in the area to be protected and has a sensitive element With an actual visual field capable of receiving signals from the emitters. Temperature: -10 ° C to 55 ° C. Current consumption: nominal (24 V DC): 8 mA (1 emitter) 10 mA (7 emitters). Dimensions: 208 mm x 136 mm x 96 mm. Certificate (305/2011 / EU - CPR).