Community Research and Development Information Service - CORDIS

Oxygen measurements on the go

An Andalusian research group has constructed a lightweight, accurate, portable oxygen sensor that is suitable for a wide variety of applications.
Oxygen measurements on the go
Fast, accurate measurement of the oxygen concentration in the ambient air is important in a number of different fields, namely medicine but also worker safety, environmental monitoring and so on. To advance state-of-the-art oxygen monitoring, researchers in Southern Spain turned to opto-chemical techniques.

Opto-chemical components retrieve the oxygen concentration from luminescence measurements. The Andalusian scientists managed to achieve a high degree of measurement accuracy, 0.5%, while minimising the number of parts. This minimal design has the advantage of reducing the overall sensor weight while its simplicity implies easy maintenance.

Attention was also paid to keeping energy requirements to a minimum. This, in combination with the low weight, makes the instrument extremely portable. Additional benefits realised include low production costs, ease of use by untrained technicians and reduced risk of electromagnetic interference.

The prototype developed can measure oxygen concentrations up to 30% with a recovery time of 30 seconds for full range step. In addition, the acquisition time is around 1 second. The instrument is reliable in environmental conditions ranging from -10 to +50 degrees Celsius.

The calibration procedure is extremely simple because only a single standard is needed. In fact, the oxygen measurement system can be calibrated with its exposition to an open air atmosphere and, therefore, neither laboratory standards nor trained personnel are required. Periodic calibration is suggested to ensure measurement accuracy and stability over time.

Contact details are provided for organisations interested in learning more about the new sensor, especially those open to collaboration for its commercial exploitation.
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