The Sterling HVAC 11J38R06890-003 Flame Sensor is a crucial safety component for your gas-fired HVAC system, most commonly found in direct spark gas fired unit heaters. This compact sensor, measuring only 1.5 Inches for the probe and 2.5 Inches overall with a weight of 0.03 pounds, plays a vital role in ensuring safe and efficient operation. It continuously monitors the presence of a ... https://www.partshnc.com/11j38r06890-003-sterling-hvac-flame-sensor