The Imperial 37065 Flame Sensor monitors the burner flame in compatible commercial gas cooking equipment. Its sensing probe detects the presence of the flame and provides a signal to the ignition control circuit, allowing the system to determine whether combustion has been established. The probe measures 3-1/4 inches, while the complete assembly has an overall length of 5 inches. https://partsfe.com/flame-sensor-for-imperial-part-37065