What scientific instruments are used to measure volume?
For liquids: the same thing as you have in your kitchen, basically. Pipettes are used for small volumes. To measure the volume of gases, a gas syringe can be used, see picture below. For solid objects, the most accurate method is probably to attach the object via a string to a hook and suspense it in a glass (filled with some liquid) on a weight. According to Archimedes’ law the volume of the object can now be calculated as the increase in weight divided by the density of the liquid.
