Aepinus Capacitor Electrostatic Demonstration Apparatus Capacity_50mL Adjustable mass on one fork

Adjustable mass on one fork shifts its 440Hz pitch by a few hertz

providing the cleanest hand-operated way to make and break a circuit during early electricity instruction with stackable modules

Wood-handled collecting net pairs a sturdy grip with fine mesh netting for classroom field trips and introductory entomology collection work

Metal spouting cylinder with multiple outlet holes at different heights

Aepinus Capacitor Electrostatic Demonstration Apparatus Capacity_50mL Adjustable mass on one forkAepinus capacitor with adjustable plates demonstrates electrostatic principles, capacitance, and electric field physics in classroom experiments.