According to one embodiment of the present invention, an electrochemical sensor (10) for detecting the concentration of analyte in a fluid test sample is disclosed. The sensor (10) includes a counter electrode having a high-resistance portion for use in detecting whether a predetermined amount of sample...http://www.google.com.au/patents/US8137529?utm_source=gb-gplus-sharePatent US8137529 - Methods of using an electrochemical biosensor