Abstract: An electrochemical device for diagnostic purposes, and particularly point-of-care diagnostic purposes, is capable of detecting quorum sensing molecules, such as AHL, within a biological sample with high precision. The device includes at least one reference electrode (RE), at least one counter electrode (CE), and two or more working electrodes (WEs). Each working electrode differs from the other working electrode(s) with respect to at least one of the following characteristics: surface area, size, material, and coating. The device also has a sample receiving area for receiving a biological sample, wherein the electrodes and the sample receiving area is fluidly connected, and a means for transferring the sample to the electrodes for measurement, and a means for displaying a result of the measurement.

Abstract: For diagnostic purposes, and particularly point-of-care diagnostic purposes, there is a need for devices capable of detecting quorum sensing molecules such as AHL within a biological sample with high precision, and which furthermore are fast and simple to use. The present invention relates to an electrochemical device, comprising: 5 —at least one reference electrode (RE), —at least one counter electrode (CE), —two or more working electrodes (WEs), wherein each working electrode differ from the other working electrode(s) with respect to at least one of the following characteristics: surface area, 10 size, material, and coating, —a sample receiving area for receiving a biological sample, wherein the electrodes and the sample receiving area is fluidly connected —means for transferring the sample to the electrodes for measurement, and —means for displaying a result of the measurement.