International Commission on Irrigation & Drainage Commission Interationale des Irrigation et du Drainage
8686. Manometer : An instrument for measuring the pressure of fluids; a pressure gauge or vacuum gauge. The pressure of the fluid is balanced against a column of a standard fluid (such as water or mercury) in a U-tube, or against the elastic force of a spring(pressure gauge) , an elastic diaphragm(vacuum gauge), or the like. | ||