Sentek Pty Ltd

University of South Australia

Michael Robert Portmann

Peter Buss

Michael Reginald Dalton

Drew Raymond Evans

Sam Rudd

David Spencer

An apparatus for selectively detecting an anion in a medium and/or selectively measuring the concentration of an anion in a medium. The apparatus comprises at least one sensor and a conductive polymer film and is configured such that dielectric and/or electric property changes of the conductive polymer film can be detected by the sensor when the conductive polymer film is in hydraulic contact with the medium or after it has been in hydraulic contact with the medium. Methods of selectively detecting an anion in a medium and/or selectively determining a concentration of an anion in a medium are also provided.

Apparatus and method for anion detection and/or measurement

The field is sensors used in the ground and in particular the provision of a sensor array element for a sensor array useable in housing that has a tapered internal and external shape. The lack of air spaces and gaps, in particular, between the outer surface of the hollow elongate sensor housing and the surrounding ground is substantially avoided when using a tapered housing. A sensor array element is disclosed including a carrier sheet of flexible material formable into a shape which substantially conforms with the shape of the inner wall of said elongate housing. The carrier sheet has electrically conductive regions wherein at least one pair of electrically conductive regions are shaped and located near enough each other to form a capacitive element. The carrier sheet has at least two pairs of electrically conductive regions forming a pair of capacitive elements, and adjacent pairs of capacitive elements have a different diameter. When the carrier sheet is shaped to substantially conform to the inner wall of the elongate housing and the capacitive element connected to a tuned circuit, the capacitive element and tuned circuit are usable to sense at least the moisture content of the environment surrounding the location of the capacitive element located within the elongate housing. The disclosure is also of a sensor and a sensor array incorporating a sensor array element.

Flexible sensor circuit arrangement

Sealing and connection cap

Growing community of inventors

Pasadena, Australia

Michael Robert Portmann