General description 26 140-175 PSI Pressure Switch with a 1/4 inch four-port connector, designed for heavy-duty air compressor applications. This pressure switch includes an unloader for added convenience and is easy to install and use. Technical specifications Pressure Range: 140-175 PSI Maximum Pressure: 175 PSI Minimum On Pressure: 50 PSI Differential: 30-40 PSI Ports: 4 x 1/4 inch Poles: 2 AMP Rating: 26 AMP Compatible with Single or Three Phase: 110/230/460 Other information Package Includes: 2 x Air Compressor 140-175 PSI Pressure Switch Control Measurement allowed error: +/- 1-3 cm Note: Light reflection and different displays may cause the color of the item to differ slightly from the real thing.