Aerometer

An aerometer is an instrument designed to measure the density (among other parameters) of the air and some gases.

The word aerometer (or Ärometer, from Ancient Greek ἀήρ -aer "air" 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 air or a determined gas.

Another instrument called areometer (from Ancient Greek ἀραιός -araiós "lightness" and μέτρον -métron "measure, scale"), also known as hydrometer, used for measuring liquids density, is often confused with the term aerometer  here defined.

Types of aerometers
 Hall aerometer.

 Hutchinson aerometer.

 Struve aerometer.

 Scheurer aerometer.

 Smith aerometer.

 Frøkjær-Jensen aerometer.

References 

Category:Gases
Category:Measuring instruments