Quick Answer: The Pycnometer is a fixed-volume glass bottle with a close-fitting stopper, used to find the density and specific gravity of liquids, powders and fine granular materials. Weighing it empty and filled gives the mass for a known volume.
Last updated: October 2026
Key Features
Bottle-shaped glass vessel of fixed volume
Close-fitting stopper to keep the volume constant
Used for liquids, powders and fine granular materials
Clear, smooth glass that is easy to clean
About This Product
The pycnometer is weighed empty, then filled with distilled water or the sample, stoppered, wiped dry and weighed again. Using the known volume, students calculate density or relative density, and the same method serves chemistry, physics, soil and material testing practicals.
Frequently Asked Questions
How is density found with a Pycnometer?
Weigh it empty with its stopper, fill it with the sample to the mark, stopper it, wipe the outside dry and weigh again; the sample mass divided by the known volume gives the density.
