Liquid level scale changeover measuring apparatus

US4461175A · kind A · utility

Assignee

• VDO Adolf Schindling AG · DE

Inventors

• Hans J. Baumgart · Schwalbach, DE
• Klaus Albrecht · Mainz, DE
• Martin Haub · Winchester, US

Key dates

• Filing date: Sep 15, 1980
• Grant date: Jul 24, 1984
• Expiry date: Sep 15, 2000

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F23/24
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An apparatus for measuring liquid level in a container, particularly the fuel tank of a motor vehicle, has a plurality of detector stages for sensing or detecting a plurality of liquid level ranges, whereby an indicator stage can be arranged to indicate a first, normal range of measurement, and a second, precise resolution can be obtained of at least a portion of the overall measurement range, without requiring an excessively larger indicator stage. This is accomplished by arranging at least two groups of sensing elements one above the other in the tank and connecting them to indicator elements via change-over circuits such that one range of measurement is made via one group of sensing elements and a second, more precise range of measurements is made via a second group of sensing elements.