US 6,981,399 B1
Method for detecting a differential pressure
Peter Jungklas Nybo, Randers (Denmark); Lasse Ilves, Helsinki (Finland); and Heikki Yli-Korpela, Vantaa (Finland)
Assigned to Grundfos A/S, (Denmark)
Filed on Sep. 25, 2003, as Appl. No. 10/670,953.
Claims priority of application No. 02021526 (EP), filed on Sep. 26, 2002.
Int. Cl. G01F 29/00 (2006.01)
U.S. Cl. 73—1.73 19 Claims
OG exemplary drawing
 
1. A method for correcting a pressure value in a level sensor of a submersible pump wherein there is provided a pressure sensor serving as said level sensor and at one point in time as a first pressure value the pressure of the surroundings is detected by said pressure sensor and at another point in time as a second pressure value the pressure of the fluid to be delivered by the pump is detected by said pressure sensor, and wherein said second pressure value is corrected on basis at said first pressure value by evaluating the pressure difference between the second and first pressure value.