A multivariable sensing device for sensing one or more parameters of a process fluid disposed in a container is provided. The multivariable sensing device includes a radio frequency based sensor configured to sense a physical parameter, a chemical parameter, a biological parameter, or combinations thereof, representative of the process fluid. The radio frequency based sensor includes a sensor substrate, a radio frequency coil disposed on at least a portion of the sensor substrate, and a support structure configured to be physically coupled to the container. Further, the support structure is configured to position the radio frequency based sensor in operative proximity to an inside of the container.