Service:Air and compatible gases.Wetted Parts:Consult factory.Accuracy:±0.10% of full scale from 60 to 78F° (15.6 to 25.6°C); ±1% of full scale from 32 to 60 and 78 to 104°F (0 to 15 .6 and 25.6 to 40°C).Pressure Hysteresis:±0.1% of full scale.Pressure Limits:See chart on catalog page.Temperature Limits:0 to 140°F (-17.8 to 60°C).Storage Temperature Limits:-4 to 176°F (-20 to 80°C).Display:4-digit LCD (.425″ H x .234″ W digits).Resolution:See chart on catalog page.Power Requirements:9 volt alkaline battery. Battery included but not connected.Connections:Two barbed connections for use with 1/8″ (3.18 mm) or 3/16″ (4.76 mm) I.D. tubing for 477B-1, 477B-2, 477B-3, 477B-4 and 477B-5 only. Two compression fittings for use with 1/8″ (3.18 mm) I.D. x 1/4″ (6.35 mm) O.D. tubing for 477B-6 and 477B-7 only.Weight:10.2 oz. (289 g).Agency Approvals:CE