Watt balance machine in operation, pan and reveal, at the National Institute of Standards and Technology, Gaithersburg, USA - Stock-Video

Pan up to reveal 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 team that work there are trying to redefine the kilogram.