kangmehanismiga ja kahe kausiga varustatud kaal massi mõõtmiseks mõõdetava objekti massi tasakaalustamisega vihtide abil, balance in its traditional form, it consists of a pivoted horizontal lever with arms of equal length – the beam – and a weighing pan suspended from each arm, whereat the unknown mass is placed in one pan and standard masses of known weight are added to the other pan until the beam is as close to equilibrium as possible