G - Physics – 01 – N
Patent
G - Physics
01
N
324/23
G01N 27/26 (2006.01) C12M 1/34 (2006.01) G01N 27/06 (2006.01) G01N 33/487 (2006.01) G01R 17/04 (2006.01) G01R 19/10 (2006.01) G01R 27/02 (2006.01)
Patent
CA 1039809
Abstract Apparatus for assessing growth of micro-organisms comprises: a pair of cells including a reference cell and a specimen cell each of which contains a sample of the same nutrient media while the specimen cell further contains a selected micro-organism contaminant. Each cell of the pair includes a pair of spaced electrodes in contact with the nutrient media contained therein. The cells are connected in series with each other across an electrical reference signal. A sensor is connected across the supply of the electrical signal in parallel with the series connected pair of cells and includes a device connected to the junction between the series connected pair of cells for generating an electrical signal in the form of one of a finite number of digital words each including a given number of digits, which digital word is representative of the electrical impedance ratio between the series connected pair of cells. The finite number of digital words is larger than the given number of digits. - 1 -
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