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To present abbreviations and fundamental conversion factors commonly used in manometry; recommended definitions of pressure in terms of a column of mercury and water; and for a large number of liquids, tables of pressure indicated by, or equivalent to, heights of columns at various temperatures. These data facilitate and standardize the use of manometers and U-tubes as direct pressure-indicating instruments or in the calibration of pressure recorders and controllers.


To reexamine and revise ISA-RP2.1-1978, Manometer Tables, last revised in 1962.

For more information, please contact:

Eliana Brazda
ISA Standards Administrator
(919) 990-9228