The core of the plastic-fiber consists of one or more acrylic-resin fibers 0. 04" in diameter, encased in a polyethylene sheath. Plastic fibers are light, cost-effective, and flexible which is why they are the most common type of fiber sensor. Highly flexible plastic fibers are especially suitable for. The fiber optic sensor has an optical fiber connected to a light source to allow for detection in tight spaces or where a small profile is beneficial. The light beam travels through the core by. Our global manufacturing network for fiber optic sensors in Ayabe (Japan), Shanghai (China) and Nufringen (Germany) focuses on continuously optimising methods for small and large volume production, applying stringent quality control procedures, and expanding production portfolio and flexibility to. A fiber-optic sensor is a sensor that uses optical fiber either as the sensing element ("intrinsic sensors"), or as a means of relaying signals from a remote sensor to the electronics that process the signals ("extrinsic sensors"). Fibers have many uses in remote sensing. A fiber optic sensor measures a physical quantity by modulating the intensity, spectrum, phase, or polarization of light traveling through the optical fiber system.