Title: Liquid flow sensing device
Application Number: 85109076 Application Date: 1985.11.19
Publication Number: 1002538 Publication Date: 1986.08.20
Approval Pub. Date: 1989.11.08 Granted Pub. Date: 1989.11.08
International Classifi-cation: A01J7/00;G01F1/56
Applicant(s) Name: Allflex International Limited Address:
Inventor(s) Name: Keith W. Jefferies;Murray Donald Long
Attorney & Agent: YANG XIAOGUANG
Abstract:
    A liquid flow sensing device which incorporates a flow sensor having a liquid flow passage through which liquid can flow. A first electrode is disposed with a first wall of the flow passage such that the electrode extends about a portion of the flow passage. A second electrode is disposed with a second wall of the flow passage in that portion of the flow passage about which the first electrode extends. The first and second electrodes are so disposed that at least portions of the electrodes are in an opposing disposition. Electronic circuitry is coupled to the electrodes and in use of the device electronic detection circuitry detects a varying capacitance between the electrodes as the amount of liquid flowing through the flow passage varies.
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