SD-32-H is a next-generation multi-functional optical smoke detector compliant with UL 217 8th Edition. It distinguishes real fires from cooking smoke and steam, detects polyurethane foam in fast and slow fires, and uses patented dust-tolerant technology to avoid false alarms. It also sends out pre-warning when maintenance and cleaning are required. With fixed point heat sensing, the detector activates when ambient temperature reaches 54–65 °C, providing timely alerts. Optional PIR motion sensors enable custom scenes like hallway lighting or energy saving, and some models include emergency lights for illuminating in darkness or dim light. The SD-32-H series combines advanced safety, comfort, and peace of mind.