a weighing scale
This instrument is a balance.
A balanced scale, which compares the mass of one object with that of a known quantity.Balance scale. Measures "weight" on Earth, but the result is easily converted to Mass.
A balance scale or weight scale is a tool that measures weight or mass.
A spring scale measures weight.
mass. That scientific, or laboratory instrument, is usually called a Beam Balance.
a scale
weight and mass measures the volume
a beaker
spectrometer spectrometer
weight
A very accurate mass spectrometer is needed.
it is called a knife