Summary

Wilhelm Ostwald´s model of one-step, incomplete combustion was used in the past to manage furnaces and boilers; it has been superseded by modern portable instruments. However, the industrial environment is hard on portable instruments, and operators of small to medium combustion systems still have Ostwald´s model at hand to check measured values.
The traditional graphical presentation of Ostwald´s model is not easy to use by the plant operator, and a novel presentation in nomograph form is given in this work.