Schneider Electric 9013-853AS Pressure Switch

Schneider Electric's Square D 9013-853AS Pressure Switch is a single-port, unloader-equipped electromechanical control device in the Pumptrol 9013 family, designed to automate pumps and compressors as system pressure changes. This diaphragm-based switch actuates electrical contacts to start or stop equipment, with a built-in unloader vent that provides pressure relief during cycle changes. Typically used in well pumps, booster systems, and related liquid-handling applications, 9013-class switches are known for rugged service and broad availability. The 853AS variant is a Square D/Schneider Electric part within the 9013 lineup; for exact electrical ratings, operating pressure range, mounting dimensions, and replacement compatibility, consult the official Schneider Electric datasheet or catalog entry for 9013-853AS.