The Eclipse 13047-1 Spark Ignitor, 14mm, Length 54mm is for use with Eclipse burners with or without flame rod detection. Typically used on Eclipse AH burners. The Eclipse spark ignitor or spark plug, lights the burner in direct spark burner configurations. The flame rod detectors can be trimmed to length in the field to sense the flame at varying operating conditions. This will account for varying flame length at low & high fire to minimize nuisance faults.