A sensor, and methods of making, for determining the concentration of an analyte, such as glucose or lactate, in a biological fluid such as blood or serum, using techniques such as coulometry, amperometry, and potentiometry. The sensor includes a working electrode and a counter electrode, and can include...http://www.google.com/patents/US20060191787?utm_source=gb-gplus-sharePatent US20060191787 - ANALYTE SENSOR WITH INSERTION MONITOR, AND METHODS