A weighted, hollow glass bulb with a long, graduated tube attached for measuring the density of a liquid. A hydrometer is placed in the liquid and the bulb sinks according to the density of the liquid [..]

An instrument for measuring the specific gravity of liquids. A hydrometer is a weight with a vertical scale attached. When placed into a liquid, the hydrometer bobs upright, and sinks to a certain lev [..]

1670s, from hydro- + meter (n.3). Related: Hydrometric; hydrometry.

A glass instrument used to measure the specific gravity of liquids as compared to water, consisting of a graduated stem resting on a weighted float.

An instrument for measuring the density of liquids.

An instrument for determining either the specific gravity of a liquid or the API gravity.

n. An instrument for determining the density of solids and liquids by flotation.

A glass cylinder with a suction bulb on one end ,that is used to measure the salt level of a lobster tank.

a glass instrument used to measure the specific gravity of beer by comparing it to that of water.

Instrument that measures specific gravity of liquids, used to measure salt, sugar or alcohol concentration. Hygiene:

(n) a measuring instrument for determining the specific gravity of a liquid or solid

 - A float type instrument used to determine the state-of-charge of a battery by measuring the specific gravity of the battery electrolyte (i.e., the amount of sulfuric acid in the electrolyte).

A simple device that measures the specific gravity of battery electrolyte. Specific gravity readings express state of charge/discharge of battery.

A device used for measuring the specific gravity of a fluid. In the case of lead acid batteries the specific gravity provides a measure of the state of charge of the cell.

An instrument used to test the specific gravity of battery fluid to determine the charge.

Sensitive instrument that measures the specific gravity and salinity of marine and brackish water aquariums.

A device used to measure the strength (i.e., the concentration of sulfuric acid in the electrolyte) of the electrolyte through specific gravity of the electrolyte.

A hydrometer is a device used to measure the specific gravity of the battery electrolyte or acid. Specific gravity of the electrolyte changes in proportion to the amount of electrical energy (voltage) [..]

An instrument for determining the specific gravity of a liquid.

Instrument for measuring the density of liquids. Usually consists of a ballasted float carrying a scale that indicates density as related to fresh water. This zero is 1000; the density of sea water is [..]

Spirits:

A floating instrument for determining specific gravities; especially of liquids and solutions. It is usually a hollow glass or metal instrument, weighted at one end so as to float upright. The stem of [..]

an instrument that measures the specific gravity of a liquid; in the case of brewing, it enables brewers to measure the concentration of sugars in wort or the progress of fermentation as the sugars ar [..]

an instrument used to measure the density of a liquid.

An instrument that measures the specific gravity of liquids.

an instrument for determining either the specific gravity of a liquid or the API gravity.

An instrument for determining the gravity (density) of a liquid.

An instrument used to measure specific gravity. In batteries hydrometers are used to indicate the state of charge by the specific gravity of the electrolyte.

Floating instrument used to measure specific gravity of a liquid.