Strip electrode with screen printing

A method of making a single use disposable electrode strip for attachment to signal readout circuitry of a sensor system to detect a current representative of a compound in a liquid sample, the strip comprising:

• a) an elongated support adapted for releasable attachment to said readout circuitry;
• b) a first conductor extending along said support and comprising a conductive element for connection to said readout circuitry;
• and
• c) an active electrode on said support in contact with said first conductor, said active electrode comprising, in a single printed layer on said support, an admixture of an enzyme capable of catalyzing a reaction involving a substrate for said enzyme, a conductive material, and a mediator capable of transferring electrons transferred between said enzyme-catalyzed reaction and said first conductor to create a current representative of the activity of said enzyme and representative of said compound;
• the method comprising:
• a) supplying an ink comprising said admixture of said enzyme, said conductive material, and said mediator;
• and
• b) printing said active electrode by applying said ink to said support in a single layer in contact with said first conductor.