ASCOS is an ECTS accredited European initiative to establish an education, discussion and contact platform for young researchers working in the field of optical chemical sensors. ASCOS aims at bringing together Europe's bright young scientists from various fields related to optical/chemical sensors, to learn from selected tutors and from each other in a relaxed atmosphere.It covers a broad range of methods, materials and applications, and provides a platform for exchange of ideas and experience for researchers working in optical chemical sensors.