Hydrometer | Pycnometer | Density Kit | Digital density meter
Hydrometer Back
	A glass body is dipped into the sample. After a short equilibration time it will swim at a certain level (when the mass of the hydrometer is equal to the buoyancy effect). The higher the density of the sample, the less the hydrometers will sink. The level of equilibration reads the density on the calibrated scale.
Pycnometer Back
	A glass beaker of defined volume is weighed without sample (M1). It is then filled with the sample and weighed again (M2). The difference between M1 and M2 (=Mass of the sample) divided by the volume of the beaker is the density of the sample.
Density kit Back
	A glass body of defined volume is weighed in air (M1), dipped into the sample and weighed again in the sample (M2). The difference between M1 and M2 (Buoyancy) divided by the volume of the glass body is the density of the sample.
Digital density meter Back
	A hollow glass tube vibrates at a certain frequency. This frequency changes when the tube is filled with the sample: the higher the mass of the sample, the lower the frequency. This frequency is measured and converted into density. A built-in thermostat controls the temperature (no water bath required).