Asa scales, also known as balance scales, are a valuable tool for measuring the weight of objects with great accuracy. However, there are many synonyms for asa scales, which can be useful to know when discussing measurement instruments and techniques. Some alternative terms for asa scales include beam scales, equal-arm scales, and counterbalance scales. Other words used to describe these scales include pivot scales, lever scales and double-pan scales. Each of these terms refers to a particular type or design of scales, but all function in a similar way - by balancing two arms against each other to determine the weight of an object.