Retro-reflective sensor SOEG-RSP-M18W-PS-S-2L With polarised light, round design, with 90? angled beam Design=Round, Conforms to standard=EN 60947-5-2, Authorisation=(* C-Tick, * c UL us - Listed (OL)), CE mark (see declaration of conformity)=to EU directive for EMC, Materials note=Free of copper and PTFE