Pycnometers

Pycnometers are also known as pyknometers. These are used for the measurement of the density of fluids.  Pycnometers are also called specific gravity bottles. These devices use mercury or water to find the volume of a substance according to the principle of Archimedes.  Some pycnometers are made of glass while the ones made for heavy duty measurements are made of thick aluminum tubing, digital tables for de-airing, vibrating tables and polycarbonate dome lids which are shatter proof.  There are pycnometer tables which have a large capacity for heavy duty undertakings. These are cam lock clamped and are 115 volts.

Other pycnometers are automated and can be used for both water and air. These involve a short time adjustment to measure your desired substance accordingly. Automated pycnometers have Peltier thermostats which are built in for temperature control. The results you get from these types of pycnometers generate operator or technician independent results because of the digital oscillation measurements and the Peltier thermostat. A printout of results is provided for the time, date and data measurements.  Small sample volumes of approximation one milliliter and measuring times as short as twenty seconds are provided by automated pycnometers.

If you are in the market for a gas pycnometer, make sure that it is able to measure the measurement and the true density of solids such as foam or fine powder. It needs to determine the precise relative humidity of density and values of temperature with a probe for RH. Ideally, the pycnometer you are planning to purchase for your lab or enterprise will have its own system for air supply and an air comparison replacement feature. Some pycnometers have features for density measurements you need to do in the field which includes being portable and have a low twelve volt option for voltage.