Results of incorrect combustion include fuel waste, an increased level of toxic emissions and potentially damaging the combustion system. Environmental and financial impacts can be significant.
The overheads of fuel consumption and system value are high in large scale industrial and commercial boilers/furnaces. In order to see return of investment and minimal running costs the operation must be kept at peak efficiency.
Complete combustion requires the correct ratio of fuel and oxygen. This is optimised and maintained by measuring the output of oxygen level of the exhaust/flue gas by using an oxygen sensor in a closed loop feedback system to a controller for regulating the input mix. This is especially useful when the quality of fuel supplied may vary (i.e. gas from different sources).