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This Square D 9012GCW2 single-stage piston-actuated pressure switch for machine-tool applications has a 90-2,900 psi range on decreasing pressure and 255-560 psi adjustable differential for control circuit applications in pneumatic and hydraulic systems. The NEMA 4, 4X, and 13 enclosure has a 303 stainless steel diaphragm housing and 440 stainless steel piston for corrosion resistance. The switch is Underwriters Laboratories (UL) Listed and Canadian Standards Organization (CSA) certified. It has a 1/4"-18 NPTF pressure connection. Square D pressure switches are manufactured by Schneider Electric.Square D brand pressure, float, and limit switches have been synonymous with safety, quality, and reliable performance for over 100 years. First launched by Detroit Fuse and Manufacturing in 1902, the Square D brand and its products continue to earn customer trust today.