The Apollo Series 65A 135°F Heat Detector is a reliable fire detection device designed to respond when a fixed temperature threshold of 135°F (57°C) is reached. Using a heat-sensitive thermistor, it provides dependable detection in environments where smoke detectors may not be suitable, such as kitchens, garages, or dusty areas. Key features include compatibility with conventional fire panels, durable construction, wide operating voltage range, and ease of installation. The Series 65A offers stable and accurate heat detection, ensuring early warning and enhanced fire safety in commercial, industrial, and residential settings.