Microwave sensing provides a powerful platform for non-invasive detection and characterization of materials, liquids, and environmental parameters. My research focuses on advancing this field through the development of metasurface-based microwave sensors that combine functional design, additive manufacturing, and rigorous electromagnetic modeling. By tailoring the geometry and spatial arrangement of subwavelength resonant elements, I create metasurfaces exhibiting sharp and tunable responses in the 1–10 GHz range—frequencies compatible with most commercial microwave systems. These structures function as highly sensitive and robust sensors capable of operating under real-world conditions. I have demonstrated their applicability in diverse contexts, including environmental monitoring, food quality assessment, chemical detection in aqueous media, and mechanical strain sensing. Beyond proof-of-concept demonstrations, my work investigates the fundamental sensing mechanisms linking physical changes in the target environment to measurable shifts in the electromagnetic response. Building upon these results, I developed a portable, metasurface-based microwave sensing device that enables rapid, in-field chemical detection. This research establishes a pathway towards scalable, low-cost, and application-driven microwave sensing technologies, bridging the gap between laboratory innovation and real-world deployment.