One of their biggest drawbacks is that they have a weak output signal. They sometimes require additional equipment to amplify the signal before a controller can interpret it. Some thermocouples. Fiber Optic Temperature Sensors offer several benefits: Immunity from electromagnetic interference and stray radiation. Fiber optic. These features of optical fibers make them a useful tool for various sensing applications including in medicine, automotives, biotechnology, food quality control, aerospace, physical and chemical monitoring. These sensors utilize light transmission properties through optical fibers to detect temperature.