An aerometer is an instrument designed to measure the density (among other parameters) of the

air The atmosphere of Earth is the layer of gases, known collectively as air, retained by Earth's gravity that surrounds the planet and forms its planetary atmosphere. The atmosphere of Earth protects life on Earth by creating pressure allowing f ...

and some gases. The word aerometer (or Ärometer, from Ancient Greek ἀήρ -aer "

" and μέτρον -métron "measure, scale") refers to various types of devices for measuring or handling of gases. The instruments designated with this name can be used to find: the density, the flow, the amount or some other parameter of the

or a determined gas. Several different designs of aerometer have been developed for the study of speech. These make use of a mask fitting closely to the speaker's face, usually with a partition separating airflow from the nose from airflow from the mouth. Various designs of transducer convert the flow of air into electrical signals. Another instrument called

areometer A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy. They are typically calibrated and graduated with one or more scales such as specific gravity. A hydrometer ...

(from Ancient Greek ἀραιός -araiós "

lightness Lightness is a visual perception of the luminance (L) of an object. It is often judged relative to a similarly lit object. In colorimetry and color appearance models, lightness is a prediction of how an illuminated color will appear to a stan ...

" and μέτρον -métron "measure, scale"), also known as

hydrometer A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy. They are typically calibrated and graduated with one or more scales such as specific gravity. A hydrometer ...

, used for measuring liquids

density Density (volumetric mass density or specific mass) is the substance's mass per unit of volume. The symbol most often used for density is ''ρ'' (the lower case Greek letter rho), although the Latin letter ''D'' can also be used. Mathematical ...

, is often confused with the term aerometer here defined.

Types of aerometers

* Hall aerometer.Marshall Hall: ''Description of an Aerometer for making the necessary Corrections in Pneumatic Experiments, for reducing the Volumes of the Gases to a given Standard.'' The Journal of science and the arts, Band 5, J. Eastburn & Co., 1818, Seite 5
Online bei Google Books
/ref> * Hutchinson aerometer. * Struve aerometer. * Scheurer aerometer. * Smith aerometer. * Frøkjær-Jensen aerometer.Børge Frøkjær-Jensen, Medizinunternehmen
Online

References

{{reflist, 30em Gases Measuring instruments