Analytical balances are highly sensitive lab instruments designed to accurately measure mass. Their readability has a range between 0.1mg - 0.01mg. Analytical balances have a draft shield or weighing chamber to prevent the very small samples from being affected by air currents. They're meant to detect very fine increments, so the slightest vibrations or breeze can impact the results. As such, analytical balances should be used in a dedicated room with as few disturbances as possible. Analytical balances need to be monitored carefully and calibrated frequently.