Spin noise spectroscopy experimental setup is devoted to ivestigations of paramagnetic particle system dynamics by means of magnetooptic methods. Our setup allows the registration of magnetization thermodynamical fluctuations of the finite system of particles with a non-zero magnetic moment. The registration is achieved by acquiring the Faraday rotation noise of linearly polarized light which probes the investigated sample. Implementation of the cutting-edge technologies provides a possibility to detect the magnetization fluctuations in the real time.