Radionics smoke and heat detectors have two components: the detector base and the detector head. The bases are permanently attached and wired to backboxes. The interchangeable heads quickly detach for replacement and cleaning without affecting the circuit wiring.
The D283 24V DC Photoeletric Smoke Detector Head uses and LED light source and a silicon photo diode to measure light reflected from particulates in a detection chamber. After two consecutive measurements exceeding the basic level, the unit signals an alarm condition.
The detection chamber, designed for reliable smoke entry characteristics, is protected by a micro-fine insect screen to minimize nuisance alarms.
The D283 combined heat and temperature detector also has a 135 degree Farenheit self-restoring fixed temperature heat sensor, allowing this single device to protect both property and personnel.
The sensitivity stability and high signal-to-noise ratio of these detectors permits their use in a wide range of environmental conditions.
These heads have a moisture-proof reed switch that reacts to an external magnet for testing. The magnet test simulates a four to six percent smoke obscura-tion, which places the detector in an alarm condition. This test is especially useful in environmentally unstable or clean areas.
