Definition of McLeod gauge in English:

McLeod gauge

Pronunciation /məˈklaʊd ˌɡeɪdʒ/


(US McLeod gage)
  • A type of mercury-in-glass manometer for the absolute measurement of low pressures, in which a known volume of the gas to be measured is compressed by the mercury into a small volume, and the resulting pressure is found from the height of the column of mercury it supports.


Late 19th century; earliest use found in James Edward Henry Gordon (1852–1893), electrical engineer. From the name of Herbert McLeod, English scientist, who invented the instrument in 1874 (Philos. Mag 48 110) + gauge.