Beam Balance – Description and Working Principle
A Beam Balance is a classical mechanical weighing instrument used to measure mass by comparing an unknown mass with known standard weights. It operates on the principle of moments (torque equilibrium). When equal masses are placed on both sides of the beam, the beam remains horizontal, indicating balance.
Laboratory Beam Balances
Main Parts of a Beam Balance
Beam – A horizontal lever pivoted at the center.
Fulcrum / Knife Edge – Central pivot point enabling free movement.
Pans – Two plates suspended from both ends for placing objects and weights.
