There is no perfect gas monitor. As with most engineered products, the end result is based on a series of intelligent compromises that allow the manufacturer to achieve his most important design goals with the minimum sacrifice in secondary design objectives.

Different manufacturers have found methods to amplify the strengths of their preferred technology and minimize the disadvantages.Gas monitors are not analytical instruments and they are not process control instruments. Their purpose is to warn of a hazardous condition so that action can be taken to prevent personal injury or property damage.Most popular gas monitors are point monitors. They are only capable of measuring the concentration of a gas at a single point in space.