LIOS Technology introduces its next generation temperature sensing instrument. The product series OTS60P (6 km range), OTS80P (8km range) and OTS100P (10km range) delivers increased performance and an extended measurement range up to 10 kilometres at a single end multimode fibre. The applied Optical Frequency Domain Reflectometry (OFDR) principle ensures a temperature survey even over long distances at an appealing spatial resolution.