Space technology serves European citizens in many non-space applications. Here can be seen a miniaturised ceramic gas sensor used to measure the oxygen level in a plasma flame in a wind tunnel used for testing re-entry space vehicle surface protection. The same ceramic sensor is now used to safeguard environment in the monitoring of oxidizable gases (COe) of burners in home heaters. Other novel non-space systems made possible with this sensor include a human breath measurement mask and hydrogen leakage instrument.