Schneider Electric acw1 Pressure Switch

The Schneider Electric ACW1 pressure switch is an electromechanical pressure-control device in the Square D lineage, now marketed under Telemecanique Sensors for pressure-switch products used in pneumatic and hydraulic systems. It provides one changeover contact (1 Form C / SPDT), enabling a control circuit to switch states when the sensed pressure reaches its setpoint. Part numbers in this family include ACW1M129012, with the former 9012ACW1M11 references migrated to ACW1M119012 as Schneider consolidated Square D ACW switches under Telemecanique branding. Typical operating ranges for ACW1 variants include a differential reading from about 0.07 bar up to 7.6 bar, and the devices are specified for use with air, hydraulic oil, and non‑corrosive fluids, making them suitable for monitoring and controlling pressure in industrial pneumatic and hydraulic circuits. Within Schneider Electric's portfolio, the ACW1 family sits under Telemecanique Sensors after rebranding Square D pressure switches, aligning with the XM-range electromechanical products designed for straightforward pressure control in industrial environments.