Multiparameter modular optical fiber sensor for applications in oil refinery

We present preliminary results of the tests performed by using a modular fiber-optic sensor for hydrostatic pressure/temperature and also rotation measurements envisaged for refinery applications. Our prototype fiber optic sensor for rotation measurements has been successfully installed and tested in the ORLEN Refinery in Plock, Poland. During the initial tests, we used rotating machine to measure its rotor velocity. As a light source we used a pigtailed laser diode (λ=635 nm) whereas the sensor head was connected to the light source and to a detector by a 100-meters-long loop of the multimode optical fibers. The output characteristics of the modular sensing system have been optimized in view of enhancing their measurement capabilities and in order to minimize disturbing environmental effects.