Pressure Gauge Ma-40-2, 5-R1/8-E-Rg with Display Unit In bar, Adjustable Red/Green Range. Indicating Range (Bar)=0 - 2, 5 bar, Conforms to Standard=En 837-1, Nominal Size of Pressure Gauge=40, Design Structure=Bourdon-Tube Pressure Gauge, Mounting Type=Line Installation, Festo