Standards:Specification:two colours dial with indication of the pressure droops filed beyond the 75% of the full scaledial graduated in mbar and p.s.i.d.max working pressure up to 100 barsuitable for being installed outside with a -20°C to +60°C room temperatureaccurancy ±20% of the full-scalemaximum index hand wich may be zeroed manually from the outsideany calibration is not requiredthe structure is able to bear full inlet pressure by one side of the membrane