The RPG Liquid Filled Pressure Gauge is a  2 1/2″ diameter liquid filled pressure gauge featuring 100 PSI pressure range with a durable stainless steel case, acrylic window, bronze bourdon tube,  and a 1/4″ N.P.T. brass bottom connection. The unit has 3-2-3% accuracy, a glycerin filled case, and a patented spring suspended movement. See also  RPVG Liquid Filled Pressure/Vacuum Gauge. Note:  The RPG must be installed vertically. Documentation & Downloads 3.801 RPG Liquid Filled Pressure Gauge Cad File DWG | 5 MB 3.801 RPG Liquid Filled Pressure Gauge Cut Sheet PDF | 178 KB