A U.S. Patent for “Multi-Analyte Sensing Using Hydrogels and Magnetometers” was awarded to Applied Biosensors on August 25th, 2020. The present invention is a sensor, comprising: a sensor probe having at least one sensor unit associated therewith, each sensor unit comprising: a hydrogel; a permanent magnetic sheet coupled to one side of the hydrogel to form a laminate structure; and a magnetometer coupled to a side of the hydrogel opposite the permanent magnetic sheet such that swelling or deswelling of the hydrogel causes movement of the permanent magnetic sheet relative to the magnetometer, wherein an entirety… Learn More