The Patterson-Kelley 86-7100-0230 Flame Rod Crown 05-050-S is a flame sensing component used in Patterson-Kelley commercial boiler systems. This flame rod verifies flame presence during burner operation, sending feedback to the ignition control to ensure safe and stable combustion. https://www.partshnc.com/86-7100-0230-patterson-kelley-flame-rod-crown-05-050-s