Patent ID: 8454330

Claim:
A submersible pump comprising: an electrical drive motor ( 3 ); a supply coupled to the electrical drive motor ( 3 ) and supplying electricity thereto; a single-stage or multi-stage centrifugal pump ( 4 ) which is driven by the electrical drive motor and having a sensor housing ( 9 ) through which fluid flows, the sensor housing being surrounded by and in contact with a surrounding fluid and being arranged between the motor ( 3 ) and the pump ( 4 ), at an end portion of the pump ( 4 ), or within the pump ( 4 ), wherein the sensor housing ( 9 ) comprises a fluid-leading housing part ( 12 ), through which passes delivery flow of the pump ( 4 ), and a fluid-free housing part ( 13 ), which is separated from the fluid-leading housing part ( 12 ) by a housing wall ( 14 ); one or more sensors arranged in the sensor housing ( 9 ); and an induction arrangement ( 17 , 18 ) comprising at least one magnet ( 17 ) rotatably arranged in the fluid-leading housing part ( 12 ), and at least one induction coil ( 18 ) arranged in the fluid-free housing part, wherein the induction arrangement forms part of a flowmeter and the submersible pump is configured such that electrical energy is produced by the induction arrangement upon operation of the pump ( 4 ) and provided to the one or more sensors.