Analytical balance

The measuring pan of an analytical balance (0.1 mg resolution or better) is inside a transparent enclosure with doors so that dust does not collect and so any air currents in the room do not affect the balance's operation.

The use of a mechanically vented balance safety enclosure, which has uniquely designed acrylic airfoils, allows a smooth turbulence-free airflow that prevents balance fluctuation and the measure of mass down to 1 μg without fluctuations or loss of product.

[citation needed] Also, the sample must be at room temperature to prevent natural convection from forming air currents inside the enclosure from causing an error in reading.

As such they must have calibration adjustments made to compensate for gravitational differences from changing locations and altitudes.

The original mechanical analytical balance was developed in the mid-18th century by Joseph Black, a Scottish chemist and physicist.