A hydrometer is an instrument that measures the density of liquids. Auto batteries could be checked to see the strength of the acid in each cell before sealed batteries were made. I don't know of an instrument for solids or gases.
There are many types density, like true density, tap density, bulk density etc. Can use analyzer like G-DenPyc 2900 gas pycnometer analyzer to measure them. Aerometer or Hydrometer for density of liquids, Dasymeter for density of gases and Resonant Frequency and Damping Analyser (RFDA) for density of solids.
you would use a scale to measure the mass and a beaker to measure the volume. i need another tool
Density = Mass / Volume. There is not an instrument that will measure both so you will need to measure them separately and calculate the density.
A seismometer is the instrument that measures the density of an earthquake, which is done by detecting and recording the vibrations produced by seismic waves. These measurements help scientists determine the magnitude and intensity of an earthquake.
you can measure the density of plastic using an instrument called electronic densimeter. this densimeter give you the density measurements very easily and fast. below is few models of this instrument.http://www.worldtesters.com/Tester_Meters/Densimeters.htm
The density of gas can be measured by using a scale! Fill a container with gas and weigh it, then use a vacuum pump to evacuate the container, then weigh the container again. The difference in weight is the weight of the gas.
An aerometer is an instrument used to measure the mass and density of gases.
It is an instrument to measure or gauge density of gravity.
To measure the density of paraffinic oil, you can use a hydrometer or a digital densitometer. Simply place the instrument in the oil sample and record the reading to determine the density. Alternatively, you can also calculate the density using the formula: Density = mass / volume, where the mass is measured using a balance and the volume can be determined using a graduated cylinder.
You do the Mass of the object then, divide the Volume away from it.
Ur voice
Any instruments that can measure mass and length. (not at the same time, doesnt have to be the same instrument). By measuring the length, height and width of an object you can determine it's volume and by weighing it you can determine it's mass. From these results it's possible to calculate the objects density.