Laboratory Balance Scales are the group of scales used for measuring the weight of objects. Also referred to as balance or balance scale, laboratory balances scales were the first mass measuring instrument ever invented. A typical balance scale comprises of a pivoted horizontal lever of equal length arms with a weighing pan, also called scale-pan suspended from each arm. The balance is used to estimate the mass of objects. This does not give a precise measurement as some of the other types of balance scales such as an analytical balance or a precision balance. The weight by such balances is determined in standard mass units. Other types of lab balance scales may include Moisture Balance, Table Top Scale, Industrial Precision Scale, Physical Balance, Chemical Balance, and others.