Service:Air and compatible combustible gases.Wetted Materials:Consult factory.Accuracy:±0.5% Full Scale, 60 to 78°F (15.6 to 25.6°C); ±1.5% Full Scale from 32 to 60°F and 78 to 104°F (0 to 15.6°C and 25.6 to 40°C).Pressure Hysteresis:±0.1% of Full Scale.Pressure Limits:See catalog page.Temperature Limits:0 to 140°F (-17.8 to 60°C).Compensated Temperature Limits:32 to 104°F (0 to 40°C).Storage Temperature Limits:-4 to 176°F (-20 to 80°C).Display:0.42″ (10.6 mm) 4-digit LCD.Resolution:See Ordering page.Power Requirements:9 V alkaline battery, installed non-functional, user replaceable.Weight:10.8 oz. (306 g).Process Connections:Two barbed connections for use with 1/8″ (3.18 mm) or 3/16″ (4.76 mm) I.D. tubing. Two compression fittings for use with 1/8″ (3.18 mm) I.D. x 1/4″ (6.35 mm) O.D. tubing for 475-7 & 475-8 only.Agency Approvals:CE, FM.