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Towards the next generation of NPL Kibble balances

The recent redefinition of the kilogram provides encouragement for widespread adoption of primary methods to realise the kilogram. To support this, NPL is building a “next generation” Kibble balance which, by eliminating the need for careful alignment of the coil and magnet, will be simpler in construction and operation than its predecessors. Work is currently concentrated on validating the operating principles of a prototype balance and ensuring its sensitivity and stability.