CONDUCTIVITY SENSOR
1 Assignment
0 Petitions
Accused Products
Abstract
A conductivity sensor is described in which electrodes are held in a desired position within a housing of the sensor by a number of slots accurately positioned within the housing. In one embodiment the slots are integrally formed within the housing. Once the electrodes have been inserted into the slots a thermoset resin is poured into the housing and cured. A through bore is then drilled through the housing, the electrodes and the cured resin to form a flow conduit through the sensor. A dual frequency excitation technique is also described that allows a measurement to be obtained of a polarisation resistance of the electrodes. In one embodiment this measurement is stored and used to correct subsequent conductivity measurements.
5 Citations
53 Claims
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1-51. -51. (canceled)
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52. A conductivity sensor comprising:
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a housing defining a flow conduit for the passage of a fluid; first and second electrodes spaced apart along said flow conduit; excitation circuitry operable to connect to said electrodes and operable to generate excitation signals; and processing circuitry operable to connect to said electrodes and operable to determine conductivity measurements of fluid flowing through the housing; wherein at least a part of said excitation and said processing circuitry is mounted on a circuit board that is connected to said electrodes by first and second edge connectors that are each directly attached to said circuit board and to an edge of a respective one of said first and second electrodes and wherein said edge connectors comprise one or more barbs for gripping the edge of the electrode when inserted into the connector. - View Dependent Claims (53)
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Specification