Two pressure balances as a mass comparator

Metrologists (measurement scientists) at the Measurement Standards Laboratory of New Zealand (MSL) have developed a novel research approach to the...

For more than a century, the base SI unit for mass was defined by a material artefact.

To measure the quantity of anything, we need a comparison with some precise unit value. Early humans used body parts...

Barometers work on the principle that the air pressure can change. High air pressure tends to indicate fair weather, and...