Dr Ian Robinson is an NPL Fellow working at the National Physical Laboratory (NPL) in the UK. He has made significant contributions to the area of dc and low-frequency electrical and electro-mechanical measurements. He has worked on coaxial ac bridges, ac current comparators, ac voltage ratio, dc voltage measurement and dynamic pressure using shock tubes. He worked with Dr Bryan Kibble on the world’s first moving-coil watt balance, now renamed the Kibble balance. This balance was an important contributor to the setting of the 1990 conventional value of the Josephson constant. The second balance: the NPL Mk II, was the first Kibble balance to operate in vacuum. It made many measurements of the Planck constant at NPL and, in 2009, Dr Robinson transferred it to NRC in Canada and ensured that it was fully capable of making a major contribution to the recent redefinition of the kilogram in terms of a fixed numerical value of the Planck constant. Dr Robinson has contributed to the work of both the CCEM and the CCM. In 2019 the Institute of Measurement and Control awarded him the Sir Harold Hartley medal in recognition of his work. In 2021 Dr Robinson was made an Officer of the Order of the British Empire (OBE), in the Queen’s Birthday Honours, for his services to Measurement Science. His current focus is leading a team to build a simple, accurate, Kibble balance, that is relatively easy both to manufacture and use. The work should help fellow laboratories to contribute to a worldwide mass scale which is both stable and robust.