The Craftsman / Porter Cable 5140110-49 Compressor Pressure Switch automatically starts and stops an air compressor by sensing tank pressure between 140 and 175 PSI. Designed for compressor-mounted installation, it provides automatic motor on/off control for air compressor systems that use compressed air. Commonly used on shop, garage, and home-workshop compressors as well as portable and light-industrial units requiring automatic pressure regulation. This switch operates with compressed air and carries the 5140110-49 part number, aligned with standard compressor motor control; common replacements include Porter Cable 5140075-09, Square D 9013FHG12J52, and Lefoo LF10-4H.
