The high sensitivity, ultra-precise interferometric displacement sensor attoFPS enables displacement detection and vibration measurements in the sub-nanometer range. Its sophisticated working principle allows the simultaneous detection of position variations of up to three targets at distances up to 1 m. Due to the elaborated three-axis design, angular variations and tilt effects can be measured and detected most precisely. In contrast to conventional laser interferometry systems, the attoFPSensor is an all fiber-based interferometer, reducing the physical dimensions of the sensor head to the millimeter range. Due to its most resistant material characteristics the attoFPSensor can also be used under extreme conditions at operating temperatures between -250°C and +150° C. Despite its exceptional sensitivity, the sensor is capable of tracking target velocities of up to 2 m/s – with no degradation in resolution or accuracy. Vibration measurements for components can be realized with up