Optic fiber is normally used in the field of telecommunications to transmit information using light, but researchers at the Universidad Carlos III de Madrid developed a technique that makes it possible to use optic fiber as a thermometer in extreme industrial environments.

The system measures the temperature of mechanical or cutting processes in areas where conventional techniques do not have access. In these environments, thermographic infrared cameras cannot be used because there is not a clear line of vision to the tool’s cutting point, nor can thermocouples or other sensors be applied because of the deterioration they will suffer and the difficulty of establishing a good location for them due to inaccessibility. However, these researchers have solved this problem using a fiber optic pyrometer.

The system has applications in environments where mechanized tools are used for manufacturing parts.