Sensors and probes for measurement and control of furnace atmospheres

New possibilities in process control by technological progress in sensor development were made during the last years. The well-tried thermocouples, zircon dioxide probes, hydrogen and oxygen sensors as well as gas analyzers have to be subject of a systematical check to assure a constant process control. In result, we still have to keep on observing the processes for selective influences in case of process deviations. So it is fundamental to know the possibilities and limits of the sensors and probes which are in use. This article deals with the measurement devices at gaseous carburizing and nitriding.