Quick Answer: Free Air Manometers measure and demonstrate pressure differences in air and gases from the height difference of a liquid column in a transparent tube. One end connects to the source under test while the other is usually left open to the atmosphere.
Last updated: October 2026
Key Features
Transparent tube on a supporting frame for clear level readings
Measures pressure difference by liquid column height
Filled with a liquid such as coloured water
Manual operation on a bench or on a stand
Technical Specifications
Specification
Value
Measurement type
Pressure difference using liquid column
Display
Visible liquid column level
Construction
Transparent tube with supporting frame
Operation
Manual laboratory demonstration
Application
Pressure measurement and air pressure demonstration
About This Product
A manometer turns an invisible pressure into a visible change in liquid level, which suits physics and fluid mechanics practicals on air pressure, gas pressure and atmospheric pressure. It also gives students a simple first look at measuring pressure with a fluid column. Educational Instrument can dispatch the Free air manometers to laboratories in Sudan, Burkina Faso, Cyprus, Kazakhstan, Argentina and Qatar.
Frequently Asked Questions
How is the pressure difference read on a free air manometer?
Connect one end to the air or gas source and leave the other open to the atmosphere, then read the difference in height between the two liquid levels.
