Patent ID: 9182264
Filing Date: 2015-11-10
Classification: G01F

Abstract:
1. A method for detecting the locations of a material boundary or boundaries included in a volume within a container, the volume comprising at least one material, wherein at least part of the volume is liquid material and at the bottom of the container the volume comprises a sedimented layer of materials, and wherein a set of probes further comprising at least one probe is used, the method comprising the steps of: introducing a set of probes comprising at least one pair of electrodes in a volume under examination; feeding current or voltage via at least one pair of electrodes, and measuring current or voltage from at least one pair of electrodes; and using a measurement geometry representing the arrangement in the calculation, and selecting a calculation algorithm needed in the calculation; wherein the method further comprises the steps of: disposing at least three electrodes of the set of probes in the volume under examination in an assembly arranged not in a straight line relative to each other, all electrodes of the set of probes being located only in the volume of the liquid material and entirely above the sedimented layer of material; calculating the electrical conductivity distribution in the volume under examination on the basis of the measurement results; and concluding, on the basis of the electrical conductivity distribution and electrode location information, the location of at least one material boundary in the volume under examination.