Bosch FCP-O320-R470 Conventional Optical Smoke Detector, 470 Ohm Alarm Resistor

A conventional detector that monitors smoke with an optical chamber only and connects to the zone circuit with a 470 Ohm alarm resistor. Automatic threshold adjustment as the sensor becomes soiled maintains consistent sensitivity throughout the service life. It is the most commonly used type in typical interior spaces such as corridors, offices, archives, and hotel rooms. Capable of operating between -20 and 65 °C, it eliminates the need to select a separate product for unheated areas.