The Middleby Marshall 33984 thermocouple probe assembly is designed to monitor oven temperature and send signals to the control system. It features a 6-inch Type J thermocouple probe with three wire leads, a wire clamp, screws, and an attachment plate. This component supports temperature monitoring and helps maintain consistent heating during commercial cooking operations. It is suitable for compatible conveyor ovens, including selected PS300, PS360, PS555, and PS570 series models. Verify the oven model and existing part number before ordering to ensure proper fit.