A double pan balance, also known as a beam balance, is a type of weighing scale that uses two pans suspended from a horizontal beam. The beam is balanced in the middle by a fulcrum or pivot point. Objects to be weighed are placed on one pan, while calibrated weights are placed on the other pan until the beam is level or balanced. The double pan balance is commonly used in laboratories for precise measurements of chemicals, powders, and other materials. It is also used in commercial settings for weighing items like produce, meat, and other goods.