Flexible sensor patch and method of using the same

A flexible sensor patch comprising:

• a flexible base having outer and inner surfaces and a periphery;
• an adhesive layer disposed on at least a portion of the outer surface;
• a sensor comprising a capacitive sensor element disposed on the inner surface of the flexible base, the capacitive sensor element comprising:
• a first conductive electrode;
• a second conductive electrode;
• and
• a dielectric microporous material disposed between the first and second conductive electrodes;
• and
• a flexible porous cover secured to the flexible base along at least major portion of the periphery,
• wherein the sensor further comprises a radiofrequency transponder disposed on the inner surface of the flexible base, adjacent to the capacitive sensor element and electrically coupled with the capacitive sensor element,
• wherein the first conductive electrode of the capacitive sensor element is disposed on the inner surface of the flexible base, coplanar with the radiofrequency transponder, and surrounded by the radiofrequency transponder, and
• wherein the flexible porous cover and the flexible base collectively enclose at least a major portion of the capacitive sensor element and the radiofrequency transponder.