Fluid identification via electrochemical labels

A fluid analysis system comprising:

• a number of reservoirs, each to hold:
• a volume of a redox label having a unique electrochemical response to an applied electrical potential;
• and
• a volume of fluid to be used in a chamber;
• a number of chambers to receive a mixture of the fluid and an associated redox label;
• a multi-electrode sensor disposed within each chamber to detect electrical signals within the chamber;
• a controller coupled to the multi-electrode sensor to:
• apply an electrical potential across multiple electrodes of the multi-electrode sensor;
• identify, from an electrical signal detected by the multi-electrode sensor, fluids currently in the chamber based on the unique electrochemical responses of associated redox labels;
• and
• measure, from a current detected by the multi-electrode sensor, a concentration of fluids currently in the chamber based on the electrochemical responses of associated redox labels.

A method, comprising:

• introducing a tagged fluid into a chamber with a multi-electrode sensor;
• measuring an electrical signal across multiple electrodes of the multi-electrode sensor;
• identifying, from the electrical signal, fluids currently in the chamber based on the unique electrochemical responses of associated electrochemical labels;
• and
• selectively activating at least one component of a fluid analysis system, which at least one component is coupled to the chamber, based on an identified fluid.