40-60 PSI, Electromechanical Pressure Switch, For Commercial & Industrial Pumping Applications, 40 PSI To 60 PSI Pressure Setting Range Activates An Electrically Driven Water Pump Within A Power Circuit When The Adjustable Rising & Falling Thresholds Are Reached, Adjustable Differential Range Is 15 PSI To 30 PSI, Cut Out Range Is 20 PSI To 65 PSI.