Bosch FCP-OC320-R470 Conventional Optical and Chemical Multi-Sensor Detector, 470 Ohm

It is the 470 Ohm alarm resistor version of a conventional detector that performs optical and chemical detection together. Since dirt accumulation in the optical chamber is compensated by active threshold adjustment, the device does not become excessively sensitive over time. It is used in structures protected by conventional panels such as residential facilities, offices, and shops. The fact that the resistance value is factory-set to this level eliminates the need to add additional components when connecting to the panel.