This straight-style furnace flame sensor features a 13/16-inch rod and a 20-1/2 inch lead with a female spade connector

reducing the risk of premature contact welding or calibration drift

Designed as a dual-stage differential switch

Designed for use on low pressure steam boilers with a maximum steam pressure of 25 psi and a maximum water pressure of 150 psi

use a multimeter to check for continuity across the switch terminals

Carrier 50DK400309 Exhaust Regulator 326058-757 This straight-style furnace flame sensorThe Carrier 50DK400309 Exhaust Regulator is a critical OEM component designed to maintain precise atmospheric pressure and ventilation control within commercial rooftop units and heavy duty HVAC systems. As a veteran technician knows, managing exhaust air pressure is vital to preventing back drafting and ensuring the mechanical integrity of the heat exchanger. This genuine Carrier replacement part is engineered to withstand the high velocity discharge