Oxygen is often not welcome in industrial environments. It is highly reactive and can seriously jeopardise process safety and product quality. However, not all oxygen measurements can be easily determined with a classical oxygen meter, e.g. in places where the measuring point is difficult to reach, at higher temperatures or when the process pressure is high. Therefore SICK has developed with Transic 100 a flexible gas analysis system for extractive oxygen measurements where a tunable diode laser is used to accurately determine the oxygen content.