Device for measuring a liquid level in a tank and associated method of use

A self-cleaning float design in the liquid level measuring device addresses the issue of magnetic particle accumulation by using an imbalanced magnetic element to remove particles through friction, ensuring reliable measurements and reducing maintenance needs.

FR3161740B1Active Publication Date: 2026-06-05SAFRAN HELICOPTER ENGINES
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Patent Information

Application Number
FR2024004454
Authority / Receiving Office
FR · FR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2024-04-29
Publication Date
2026-06-05
Estimated Expiration
2044-04-29

AI Technical Summary

Technical Problem

Existing liquid level measuring devices in tanks, such as those in aircraft lubrication oil reservoirs, are hindered by magnetic particles that accumulate on the magnetic element, requiring frequent maintenance to ensure accurate readings, leading to increased downtime and costs.

Method used

A liquid level measuring device with a float design that includes a magnetic element positioned in the upper half of the main body, causing an imbalance and friction against the guide conduit walls to automatically remove magnetic particles, reducing the need for maintenance.

Benefits of technology

The device effectively cleans itself of magnetic particles through friction, ensuring reliable liquid level measurements without the need for frequent maintenance, thus reducing downtime and costs.

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Abstract

A measuring device (1) for measuring a liquid level (K) in a tank (R), the measuring device (1) comprising a guide conduit (2); a plurality of magnetic switches (4A-4D) each configured to move between an open state (E1) and a closed state (E0); a float (3) mounted for translational movement within the guide conduit (2), the float (3) comprising a main body (6) and at least one magnetic element (5), configured to change the state of a magnetic switch (4A-4D) so as to determine the liquid level (K), the main body (6) extending longitudinally along a body axis (X6) oriented from bottom to top between a lower end and an upper end, the main body (6) having a body height defined along the body axis (X6) from the lower end, the magnetic element (5) being positioned in an upper half of the main body (6). (Shortcut Figure: Figure 5)
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