Patent · US Expired

Remote conductivity sensor having transformer coupling in fluid flow path

US4740755A · kind A · utility

132Cited by
5References
4Claims
0Family size

Assignee

Inventor

Key dates

Filing dateMay 30, 1986
Grant dateApr 26, 1988
Priority date—
Expiry dateMay 30, 2006

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01N27/023
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A cell for remotely sensing conductivity of a fluid passing through it, the cell having an inlet and an outlet and two fluid paths between the two, thereby defining a fluid loop, an excitation transformer comprising a first toroidal core having a hole through it and wire turns around it, the core encompassing a portion of the fluid loop therein, and a sensing transformer comprising a second toroidal core having a hole through it and wire turns around it, the core encompassing a portion of the fluid loop, the cores being coplanar to thereby reduce leakage between the transformers.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.