Patent ID: 7845239

Claim:
An electro-magnetic flow chamber cassette and flow chamber cassette receiver assembly for measuring a flow rate of liquid, comprising: (a) a liquid flowing apparatus, which is communicatively linked with a flow chamber cassette to flow a liquid through a flow chamber defined within and across a width of a cassette body of said cassette; (b) the cassette body having an insertion length with a uniform rectangular cross section across the width of the cassette body and thereby defining an upper body surface and a lower body surface parallel to each other, where an insertion flange extends forward from the cassette body and conduit means extend from the cassette body for connection of the flow chamber to the liquid flowing apparatus; (c) two or more pairs of electrodes alignedly integrated with said flow chamber, said electrodes arranged in adjacent pairs spaced apart along a length of said flow chamber housing so that each electrode pair has opposing ends in contact with said flowing liquid to define an axial distance normal to said flowing liquid, where external pin connectors exposed at the insertion flange are electrically connected with each of said electrodes; (d) the receiver comprising a powered coil and a C-shaped core extending by way of two ends of a core section from a central bore in the coil to top and bottom sections generally parallel and normal to an axis of the core section, wherefrom respectively ends of the top and bottom sections extend toward each other an upper section and a lower section to define an orientation slot having parallel upper and lower surfaces separated from each other by a distance about equal to a height of said rectangular cross section of the cassette body for generating a magnetic field across said orientation slot; and (e) the receiver further comprising pin connection means supported in a space defined between inside surfaces of said top and bottom sections so that the insertion flange is removably insertable therein when the cassette body is located in the orientation slot, thereby locating the flow chamber in said magnetic field and electrically connecting said external pin connectors to microprocessor means for determining voltage across each electrode pair and therefrom calculating a flow rate of said flowing liquid for output to a user interface.