Title:
LIQUID LEVEL SENSOR
Document Type and Number:
WIPO Patent Application WO/2022/004739
Kind Code:
A1
Abstract:
This liquid level sensor 1 includes: a sleeve 2 that is provided in a vertical direction; a float 3 that moves along the sleeve as a liquid level fluctuates; a resistance row 4; a plurality of grounding means 5 that are provided inside the sleeve; and a liquid level signal output means 6 that extracts, as a liquid level signal that is a signal corresponding to the liquid level, an electric signal detected between a positive electrode side end part 4a and a connection part grounded by the grounding means 5, and further includes a warning signal output means 7 that outputs a warning signal when the float 3 is located within a predetermined distance from a warning position that is a predetermined position within a movable range of the float 3. Accordingly, a compact and highly reliable liquid level sensor is achieved.
Inventors:
SASAKI AKIRA (JP)
Application Number:
PCT/JP2021/024612
Publication Date:
January 06, 2022
Filing Date:
June 29, 2021
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
G01F23/62; G01F23/56
Foreign References:
| JPS6232334U | 1987-02-26 | |||
| JP2003050151A | 2003-02-21 | |||
| JPH0729423U | 1995-06-02 |
Attorney, Agent or Firm:
PROSPEC PATENT FIRM (JP)
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