Key Benefits for HVAC Professionals Precision Thermal Protection: Calibrated to trip at exactly 248°F to prevent catastrophic component failure

providing direct-fit replacement parts that restore the seal between the gauge glass and the valve body

the Schneider Electric (Square D) 9013FSG2J20P Switch remains the industry standard for electromechanical pressure regulation

Compatible with Nest

Cleveland Control AFS-181-43 Switch Key Benefits for HVAC ProfessionalsThe Cleveland Controls AFS 181 43 is a professional grade air flow switch engineered for high accuracy pressure sensing in HVAC, industrial air handling, and process control applications. Functioning as a Single Pole Double Throw (SPDT switch), this unit is designed to monitor positive, negative, or differential air pressure. It features a field adjustable setpoint range of 0. 05" . 02 to 2. 0" w. c., allowing for precise calibration to meet specific