A laboratory scale is a precision instrument used to measure the mass of small quantities of substances in a controlled environment. These scales are essential in scientific research, quality control, and educational settings, providing accurate measurements for experiments and analyses. They typically have a high degree of sensitivity and can measure in grams or milligrams. Laboratory scales come in various types, including analytical balances and top-loading balances. Analytical balances are designed for high precision, often featuring draft shields to minimize air currents that could affect measurements. In contrast, top-loading balances are more versatile and easier to use for larger samples, making them suitable for a range of laboratory applications.