Manufacturer Name: BASO Gas Products Product Number: Q90FF-1 OEM Part Number: Q90FF-1 The BASO Q90FF-1 Pilot Assembly/Sensor is a replacement component for gas-fired HVAC systems. A flame sensor and a pilot burner are combined into one unit. During startup, the main gas burner is ignited by the pilot burner, which is a tiny, continuously burning flame. The flame sensor, which is ... https://www.partshnc.com/q90ff-1-baso-gas-products-pilot-assysensor-18-cbl-032