Square D 9012-ACW1 Pressure Switch

Square D 9012-ACW1 Pressure Switch is an industrial control device that automatically starts and stops pumps, compressors, and other equipment by switching a control circuit when the system pressure reaches a set point. It belongs to Square D’s 9012 Class, Series B family of pressure switches, designed for rugged service in hydraulic and pneumatic systems. A distinctive feature of ACW-series switches is pulsation dampening: they are furnished with pulsation plugs (about.060) to prevent false operation from minor pressure surges on fluctuating lines. The 9012 family is widely used in industrial control applications, and configurations vary by model in terms of contact form (such as SPDT/DPDT), voltage rating, and adjustable setpoints; always refer to the official catalog or datasheet for your exact version to confirm electrical and mechanical specifications. Square D, a brand of Schneider Electric, has long offered these switches for equipment like water pumps, air compressors, and other automated systems where maintaining a defined pressure setpoint is critical. The 9012-ACW1 variant is one of several 9012ACW/ACW1 options designed to provide reliable control with straightforward installation in panel-mounted or inline configurations.