Lochinvar & A.O. Smith 100297134 Flame Sensor 321702-401 offering field-proven reliability for professional

offering field-proven reliability for professional contractors maintaining fluid make-up systems

The TEFC (Totally Enclosed Fan Cooled) design protects internal components from airborne debris and moisture

Versatile Installation: Supports both NPT threaded and flange mounting options to simplify integration into existing gas trains

With a functional pressure range of 10" Hg to 100 psi and an adjustable 10 psi differential

Lochinvar & A.O. Smith 100297134 Flame Sensor 321702-401 offering field-proven reliability for professionalThe Lochinvar & A. O. Smith 100297134 Flame Sensor is a critical genuine OEM replacement part engineered for precision flame rectification in high efficiency gas fired systems. Designed for use in Lochinvar boilers and A. O. Smith water heaters, this sensor monitors the burner flame to ensure the ignition control module receives a continuous microamp signal. If the flame signal is lost or carries high resistance, the system initiates a safety lockout