BJH-20B ionization smoke detector is original marine fire equipment manufactured by AUTRONICA Norway, fully compliant with SOLAS and EN 54-7 standards. Equipped with Am-241 radioactive ion chamber, it provides high sensitivity to open-flame smoke from burning cables, oil and wood, ideal for engine rooms and cable tunnels on vessels. The radial wide louver cover prevents blockage by engine room oil mist and dust, and the two-wire marine fire bus enables daisy-chain wiring to save ship cable cost. Built-in self-test circuit automatically reports faults to fire control panel, widely used as replacement spare parts for marine fire alarm systems, often paired with BDH-200 photoelectric smoke detectors for full-range fire monitoring.
