The NDC 4375-OKB is a high-quality fixed temperature heat detector manufactured by Nippon Dry-Chemical, a trusted name in fire protection systems. Designed for reliability and precision, this device activates an alarm when the ambient temperature reaches a predetermined fixed point, providing a crucial early warning in the event of a fire. Its robust, low-profile circular housing is ideal for ceiling mounting in commercial and industrial environments, particularly in areas where smoke detectors may be unsuitable due to dust, fumes, or high humidity, such as kitchens, boiler rooms, or parking garages. Engineered for compatibility with conventional fire alarm control panels, the 4375-OKB ensures dependable performance and seamless system integration.