Differentialmanometers differential manometer, Torricellian barometer, and siphonFigure 1: Schematic representations of (A) a differential manometer, (B) a Torricellian barometer, and (C) a siphon. Instruments for comparing pressures are called differential manometers, and the simplest such instrument ...
A barometer for measuring the pressure of the atmosphere in absolute terms is simply a manometer in which p2 is made zero, or as close to zero as is feasible. The barometer invented in the 17th century by the Italian physicist and mathematician Evangelista Torricelli, and still in use today,...
A barometer for measuring the pressure of the atmosphere in absolute terms is simply a manometer in which p2 is made zero, or as close to zero as is feasible. The barometer invented in the 17th century by the Italian physicist and mathematician Evangelista Torricelli, and still in use today,...
ananeroid barometer, in which the sensing element is one or more hollow, partially evacuated, corrugated metal disks supported against collapse by an inside or outside spring; the change in the shape of the disk with changingpressurecan be recorded using a pen arm and a clock-driven ...