Handheld Vacuum Pump with Gauge Category_Chemicals providing the simplest open-or-closed action

providing the simplest open-or-closed action used to introduce circuit-completion concepts in early electricity units

Demonstrates how current through a coil produces a controllable magnetic field

Four 50 gram brass slotted masses paired with a 50 gram hanger

Hand-cranked friction-wheel drive sandwiched between clear acrylic plates

Built on a step-up transformer with an electromagnetic shaker pulsing the primary winding

Handheld Vacuum Pump with Gauge Category_Chemicals providing the simplest open-or-closed actionFitted with a built in mercury gauge and flexible hose, this handheld vacuum pump pulls partial vacuum for gas law demonstrations, vacuum filtration, and leak testing.