Demonstration Aneroid Barometer : Key Features Transparent acrylic case - allows students/observers to see the internal mechanism and how the barometer works Fully visible movement - educational design shows the aneroid capsule mechanism in action Responds to air pressure changes - functional instrument for real measurements Includes a rubber bellow - for demonstration purposes to manually increase pressure and show how the instrument responds Educational Use This barometer is specifically designed for teaching and demonstration, making it ideal for: Science classrooms and laboratories Physics demonstrations Meteorology lessons Understanding atmospheric pressure concepts The transparent housing distinguishes it from standard barometers, as it allows students to observe the mechanical operation of the aneroid capsule (the metal chamber that expands/contracts with pressure changes) and linkage system that moves the needle. The included rubber bellow lets instructors demonstrate cause-and-effect by manually creating pressure changes and showing the immediate response on the dial. Product Specifications Product Code: SE.GE0035-01 Dial Size: 100mm Graduations: 28 to 31 inches of mercury 960 to 1060 millibars