The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 1988
Filed:
Aug. 13, 1986
Applicant:
Inventor:
Naim Dam, Oakland Gardens, NY (US);
Assignee:
Introtek International, Inc., Deer Park, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7330 / ; 73313 ; 324 / ; 340620 ;
Abstract
A liquid level sensing system having a sensing head with a pair of mutually insulated metal electrodes, one of the electrodes connected to the output of an amplifier and the other to the input. The gain of the amplifier is sufficienty high such that it will oscillate when the electrodes are immersed in a liquid and will be non-oscillatory when the electrodes are in air. The oscillation of the amplifier is detected to produce a signal corresponding to the presence of a liquid and also its characteristic.