The OSAKA BOILER J1550S is a high-reliability flame safety control relay designed for industrial boiler and burner management systems. This essential safety device continuously monitors the burner flame and automatically shuts off the fuel supply in the event of a flame failure, preventing potential hazards from unburned fuel accumulation. Engineered for durability and precision, the J1550S operates on a standard AC 110V power supply and utilizes an 11-pin tube socket base for easy installation, integration, and maintenance within existing control panels.