Strain Gauges are one of the vital geotechnical sensors that measure strain in underground cavities, tunnels, buildings, concrete, masonry dams, bridges, embedment in soil/concrete etc. It is a resistance that varies with applied force, as it converts force, pressure, tension, weight, etc., into a change in electrical resistance that is measurable. Stress is determined as the object’s internal resisting forces, and strain is defined as the displacement and deformation that occur.