Watt balance machine housed at the National Institute of Standards and Technology, Gaithersburg, USA - stock video

The Watt Balance machine at the National Institute of Standards and Technology, Gaithersburg. It is an experimental electromechanical weight measuring instrument that measures the weight of a test object very precisely by the strength of an electric current and a voltage. The building is made of wood to avoid interfering with the sensitive scales. And the team that work there are trying and redefine the kilogram.