An air-entrainment device for preparing precision gas mixtures
Related Experiment Video
Updated: Oct 23, 2026

A System to Create Stable Nanoparticle Aerosols from Nanopowders
Published on: July 26, 2016
Abstract:
Three low-cost venturi's built from readily available materials are described and evaluated to determine whether they can be used to prepare precision gas mixtures for the calibration of gas analysers. Using pure oxygen (O2) and nitrogen as the priming gases the venturi's generated mixtures with an O2 concentration within the range 12-53% O2. Over a two-week period, the variability was found to be less than 0.25% O2. The mixtures produced were found to vary according to the density of the priming gas, but were virtually independent of the priming flow rate. We conclude that the venturi may offer a simple and inexpensive method of preparing precision gas mixtures suitable for the calibration of gas analysers.
Related Concept Videos
Bernoulli's Principle: Applications
Entrainment devices use a high fluid speed to create low pressures and, thus, entrain one fluid into another. Some examples of these devices are given below:
Atomic Absorption Spectroscopy: Atomization Methods
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
Air-entraining Agents
Effects of Air-entrainment in Concrete
Bioreactor Controls-II

