The supply of gases has been solved but we want to be able to control the gas, especially when we run testing in inert environments. The rig has therefore been equipped with an oxygen probe. We decided to measure the oxygen content of the outlet gas in order to rule out gas leakage in the gas chamber. This probe is called SS27 and is delivered by Zirox GmbH. According to specification, it can measure down to 10-25 vol-ppm oxygen.