HALES PIEZOMETER Meaning and
Definition
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Hales piezometer, also known as a Hales siphon, is a scientific instrument used to measure the pressure or force exerted by a fluid, typically a gas or liquid. Named after the British physiologist Stephen Hales, this device provides a means of quantifying the pressure exerted by a fluid in a closed chamber.
The Hales piezometer consists of a glass or metal tube with one end open to the atmosphere while the other end is submerged in the fluid whose pressure is being measured. The open end is positioned at the same level as the fluid's surface, ensuring that the pressure acting on the instrument is equal to atmospheric pressure.
The measurement principle behind the Hales piezometer involves the use of a siphon, which allows the fluid to be transferred out of the chamber. By measuring the height of the fluid column that rises in the siphon, the pressure exerted by the fluid can be determined.
To ensure accuracy, the Hales piezometer must be calibrated using a mercury barometer or a manometer to account for changes in atmospheric pressure. Additionally, the fluid in the chamber should be allowed to settle to a static condition before measurements are taken.
Hales piezometers are commonly utilized in various fields, including physics, fluid mechanics, and environmental science, to measure and monitor pressures in hydraulic systems, pipelines, and other applications where precise pressure measurements are required.
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A glass tube inserted into an artery at right angles to its axis, the pressure being shown by the height to which the blood ascends in the tube.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for HALES PIEZOMETER
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Etymology of HALES PIEZOMETER
The word "Hales piezometer" is composed of two parts: "Hales" and "piezometer".
1. "Hales": The term "Hales" refers to Stephen Hales, an English clergyman and scientist who lived from 1677 to 1761. Hales made significant contributions to various scientific fields, including botany, physiology, and pneumatics. He invented several measuring instruments, one of which was the piezometer, hence the naming of "Hales piezometer" in his honor.
2. "Piezometer": The term "piezometer" comes from two Greek words — "piezo" meaning "to squeeze" or "to press", and "metron" meaning "measure". Together, they form a word that describes a device used to measure the pressure or force exerted by a fluid.
