Air quality is defined as a measure of the condition of air relative to any need or purpose. Air quality testing instruments and air quality analysis techniques measure the pollutant concentration from industry in the atmosphere, or for employee exposure to vapour, fume, gas or dusts at work. Air quality and testing equipment An air quality analyser can either be a fixed system for long term measurement of pollutants or, as technology has improved, it can be a small personal dose monitor to measure the exact area the worker is in. Equipment and systems have moved on in terms of accuracy, size, power and build quality. Remote air quality testing is now possible in the harshest conditions and environments.