1Multi Purpose: Digital pressure regulator is widely used in automotive refinishing, shipbuilding, construction, woodworking, furniture manufacturing, etc. 2Transparent Design: Oil water filter can visually check the accumulated oil or moisture and clean it through the spring loaded valve at the bottom. 3Easy to Use: Complete assembly through the knob thread, connect the spray guns, press the button on the dial to view the corresponding PSI, BAR, KPA, kg,cm parameters. 4Small Portable: Water oil trap filter separator is compact in structure, light in weight, and it is not easy to fatigue when used for a long time. 5Wide Application: Digital pressure regulator is a compact filter device suitable for various types of spray guns.