Consortium
Danish Fundamental Metrology A/S (DFM)
DFM's scientific research delivers new knowledge, measurement techniques, and standards that support the accurate measurements required by Danish industry and authorities. Its services include high-level calibrations and reference materials traceable to national primary or reference standards, metrology-related courses, and consultancy. DFM holds a special role in developing measurement capabilities. www.dfm.dk
CMS Medizinische Anlagen und Systeme GmbH
Based in Bernkastel-Kues, Germany, CMS specializes in medical safety engineering for medical gases, compressed air, and vacuum systems in hospitals. www.cms-elektronic.com
Castle Group Ltd
Castle Group Ltd contributed its industrial expertise to the DOCA consortium. www.castlegroup.co.uk
PAJ A/S
PAJ A/S provided industrial testing facilities and operational support during the sensor validation phase. www.paj.dk
VSL (Dutch Metrology Institute)
VSL, the national metrology institute of the Netherlands, contributed its expertise in certified gas mixtures and precision measurement to confirm the sensitivity and linearity of the DOCA sensor head. www.vsl.nl
Project Acronym
DOCA — Detection of Oil in Compressed Air. Project reference: FP7-SME-286106. The project ran from 1 September 2012 to 30 August 2014 and received funding from the European Union's Seventh Framework Programme managed by REA under Grant Agreement N. 286106.
The DOCA project brought together a carefully selected consortium of partners from across Europe, each contributing specialized expertise in optical spectroscopy, sensor engineering, and industrial compressed air systems. This collaborative framework was essential for tackling the long-standing challenge of detecting oil contaminants in compressed air with high sensitivity and reliability. By uniting research institutions with small and medium enterprises experienced in precision instrumentation, the project created a synergy that accelerated the development of novel detection methods. The partnership structure ensured that theoretical advances in spectroscopy were rapidly translated into practical, field-ready solutions that could meet the demanding requirements of industries requiring strict air purity standards.
A major focus of the project was addressing the limitations of traditional laboratory-based oil analysis, which is labour-intensive, slow, and often inadequate for real-time process control. The consortium recognized that industries such as pharmaceuticals, automotive manufacturing, and chemical processing depend on compressed air free from oil in liquid, aerosol, and vapor forms. By developing an online, highly sensitive detection system based on advanced optical techniques, the partners aimed to eliminate the reliance on manual sampling and off-site testing. This shift toward continuous, in-line monitoring represented a significant advancement in quality assurance and regulatory conformance for critical applications.
The sensor technology at the heart of the DOCA project was designed to detect extremely low concentrations of oil contaminants, meeting the rigorous ISO classification standards for compressed air purity. Through dedicated work packages, the partners addressed key technical challenges including measurement repeatability, robustness against environmental interference, and long-term calibration stability. The chosen approach leveraged the principles of optical spectroscopy to distinguish oil signatures from other potential contaminants, enabling selective and accurate detection. This level of sensitivity and specificity was previously unavailable in online monitoring systems, making the project's outcomes highly relevant for industries with zero-tolerance policies for oil contamination.
Beyond the technical achievements, the DOCA project delivered lasting benefits for the consortium partners and the broader industrial community. Small and medium enterprises gained access to cutting-edge sensor technologies and intellectual property that enhanced their competitive position in the global market. End users across sectors such as textiles, electronics, and clean manufacturing acquired new capabilities for ensuring product quality and eliminating risks of civil liability arising from contaminated compressed air. The project also contributed to the harmonization of testing procedures across Europe, supporting the adoption of more efficient and reliable quality control practices that align with mandatory regulatory norms and industry best practices.