In environments where reliable fire detection is critical, such as on ships and other maritime vessels, photoelectric smoke detectors play a vital role. The SOC-24VN conventional photoelectric smoke detector is designed to provide robust performance in various open areas, including in-duct applications. It features a computer-designed non-directional smoke chamber that ensures effective detection of both smoldering and fast-flaming fires. Compatible with NS-4 Series, NS-6 Series, HSC-4R, or HSC-R bases, the SOC-24VN offers low-profile installation at just 2 inches high when mounted on a base. The detector is equipped with a bicolored LED that provides clear visual status indications: green for normal operation, red flashing if sensitivity drifts outside UL-listed limits, and continuous red during an alarm. Its infrared LED light source and silicon photodiode receiving element ensure highly stable operation, even in environments with high humidity and temperature variations ranging from 32°F to 120°F (0°C to 49°C). The SOC-24VN also includes RF and transient protection to minimize false alarms, and its low standby current of 59μA at 24VDC makes it energy-efficient. Additionally, the detector’s automatic sensitivity window verification function meets NFPA 72 requirements for inspection, testing, and maintenance, ensuring continuous reliability. For optimal performance, sensor spacing should comply with NFPA 72 guidelines, typically not exceeding a nominal spacing of 30 feet (9.1 meters) on smooth ceilings. The SOC-24VN is UL listed and can be used in conjunction with or as a replacement for other Hochiki America detectors on HSB and HSC base applications.