Patent ID: 6725554
Filing Date: 2004-04-27
Classification: G01C

Abstract:
An electrically non-conductive housing (1) of an electronic spirit level formed of a round tube bent in a round ring is partially or exactly Â½ filled with electrically conducting liquid (2), characterized with it, that in the housing (1) upon the wall of the tube along the whole circumference are placed two or several layers of metal strip (4) where the cross-section uniformly changes, the layers of metal strip (4) are put one upon the other so that in the contact of flat surface where the width is uniformly changing, that the thickness of metal strip (4) is constant, the layers of metal strip (4) are partially electrically separated so that the joining flat surfaces are insulated, lateral edges of the whole thickness (15) are not insulated and are in direct contact with liquid (2) and the terminal (5), (6) for voltage and a measuring instrument (17), are outside of the housing (1).