Fiber optic sensing describes a set of differing technologies that can be used to convert a physical or an environmental change to the fiber into a measureable optical signal. Optical fiber offers the distinct advantage that it is relatively inexpensive considering that the sensors are able to measure over lengths of up to 100km. AMS Technologies can offer systems that measure strain and temperature using either Brillouin scattering, the Raman Effect or Bragg backscattering. AMS also supply a platform of optical switches that allows multiplexing a single sensor to several fibers.