An air flow rate measuring device includes a housing, a sensor assembly, and an urging mechanism. The invention also relates to a corresponding highly efficient method for the positioning and electric characterization of such membranes with a consistently high signal-to-noise ratio. The system further includes a plurality of hinge posts, each respectively connected near the corners of said transportable platform. , at the end of a tooth portion composing the comb-like pattern. Strain measurements are transmitted to the surface either by a continuous optical fiber light path or by telemetry of a digitized signal. Cache coherency is maintained, and data move and compare operations may be performed efficiently on cached data.