Process and device for measuring speed of flow and gas volume of a liquid metal flow

The magnetic probe immersed in the liquid metal flow (sodium) produces two voltages in two predetermined volumes on the Faraday induction principle, which are taken to two amplifiers. There is a correlator for determining the cross correlation function and the transport period. The outputs of the amplifiers are switched to a measuring instrument which responds quickly to determine the gas volume. The magnetic probe itself consists of a tube closed at one end, which is concentrically mounted in a jacket tube, and forms an annulus with this, through which the liquid metal flows. There are two disc-shaped permanent magnets made, for example, of AlNiCo 450 at a certain spacing from each other in the magnetic probe, and there are two pairs of electrodes associated with them. These give the voltage signals for the amplifiers. The material of the probes and the jacket tube is V2A. (HP)