Is your air compressor acting up? This Telemecanique pressure switch might be the fix. It's a heavy-duty unit designed to control the motor on your compressor. It cuts the power off when the pressure hits 150 PSI and kicks it back on when it drops to about 120 PSI (that's the fixed 30 PSI differential). It has a 1/4-inch NPSF internal port for your air line and screw terminals for wiring. The switch has a manual cut-out lever with Auto and Off positions. It's housed in a polypropylene enclosure, meets safety standards (UL 508, CE, CSA), and is rated for direct motor control. Great for compressors, water pumps, irrigation systems, and other industrial machines. A reliable, professional-grade component.