A new way to measure pressure is born from efforts to redefine temperature
By 
Katrina Krämer2020-02-06T10:55:00
20 years after the idea was first dreamt up, scientists can now realise the SI unit Pascal by measuring helium’s electrical properties
Scientists have turned a temperature experiment used to redefine the Kelvin on its head to make one of the world’s most accurate pressure gauges. The experiment is an entirely new way to measure pressure solely from helium’s electrical and quantum mechanical properties. Eventually, it could replace current standards that rely on mechanical pistons or tubes filled with mercury.