Explore 71 top manufacturers and suppliers of Fiber Optic Sensors in our comprehensive photonics buyers' guide. A fiber optic sensor is a device that uses optical fibers to detect and measure physical, chemical, biological, or environmental parameters. The FU Series offers a wide variety of options including thrubeam, reflective, retro-reflective and definite reflective sensing heads. They modulate light properties — such as intensity, phase, polarization or. Three times higher emission power and 1. It has reasonable pricing while drastically improving flexing performance.