Quick Answer: Torricelli’s Apparatus demonstrates atmospheric pressure and the barometer principle with a vertical glass tube, a liquid reservoir and a measuring scale on a metal stand. The liquid column held up in the tube shows the pressure of the air.
Last updated: October 2026
Key Features
Vertical glass tube that is filled and inverted into the reservoir
Liquid reservoir at the base of the tube
Measuring scale for the height of the liquid column
Metal stand and supporting fittings
Technical Specifications
Specification
Value
Tube
Glass, vertical arrangement
Stand
Metal, with supporting fittings
Scale
Measuring scale for liquid column height
Reservoir
Liquid reservoir at the base
About This Product
Once the filled tube is inverted into the reservoir without letting air in, the liquid falls a little and then stays steady, leaving an empty space at the closed end known as the Torricellian vacuum. Measuring the column height shows how atmospheric pressure supports it and explains how a barometer works. Filling is done only as laboratory instructions direct. Enquiries from Nicaragua, Jamaica, Honduras, Eritrea, Dominican Republic and Belarus for the Torricelli’s apparatus receive an export quotation.
Frequently Asked Questions
What is the Torricellian vacuum?
The empty space left above the liquid column at the closed end of the tube after it is inverted into the reservoir.
