The Apollo Series 65 Optical Smoke Detector (Model 55000-315) delivers reliable smoke detection using advanced optical sensing technology. Designed with a built-in magnetic test switch and a flashing LED indicator, it allows for easy maintenance and visual confirmation of operation. Operating on a supply voltage range of 9–33 VDC, this detector offers high performance, durability, and compliance with safety standards, making it ideal for commercial, industrial, and institutional fire safety applications.