Composite sensor capable of measuring two or more analytes

A composite sensor for measuring at least two analytes, comprising:

• a first sensor comprising a first substrate including a first body and a first probe extending from the first body, a first electrode disposed on a surface located in a first direction of the first substrate, and a first sensing layer electrically connected to the first electrode and disposed on the first probe;
• a second sensor comprising a second substrate including a second body and a second probe disposed in a region extending from the second body, a second electrode disposed on a surface located in a second direction opposite to the first direction of the second substrate, and a second sensing layer electrically connected to the second electrode and disposed on the second probe;
• and
• a counter electrode disposed between the first sensor and the second sensor;
• wherein, when the first sensing layer contacts an analyte in a body, the counter electrode is configured to cause a first potential difference with the first electrode based on a first component included in the analyte, and when the second sensing layer contacts the analyte, the counter electrode is configured to cause a second potential difference with the second electrode based on a second component included in the analyte.