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A hydrometer is an instrument that measures the specific gravity (relative density) of liquids—the ratio of the density of the liquid to the density of water.  For wine and beer making, a simple hydrometer is used to determine the amount of alcohol in the brew in order to decide when it is ready to be placed in bottles.
Glass chemical test tube scale on blurred background
A syringe with colorful rainbow liquid inside, an injection with a rainbow
Ruler
Measuring cup isolated on bright background
Measure water depth with a folding ruler
Thermometer, Hygrometer
Thermometer outside the window
Close-up of a tape measure on a blue defocused lights bokeh background. Shallow depth of field, space for copy.
Thermometer meters Indications degrees celsius
Thermometer Close-up with Green Background
hygrometer gauge
Measuring tape
Thermometer 20 degrees blurred focus macro image
Kilogram-force per square centimetre meter
Filled medical syringes close-up as a medical background.
Close-up of a tape measure on a blue defocused background. Shallow depth of field, space for copy.
High humidity at home.
price of gasoline close up photo
All temperature sensors indicate the temperature of the hot water pipe. Pressure and temperature sensor in the hot water supply system
Plastic instrument for measuring linear dimensions in approximation
Fifty. Tailor's wooden meter ruler on black background.
Close-Up Of Empty Beakers And Flasks Against White Background
Number 10 Pattern Design on Banknote
Yellow metal ruler close up with millimeters and centimeters
diesel refueling system
Silver thermometer with blue background for copy space
Digital display of electric smart meter.
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