Fig. 4

Sensitivity as a function of a the inner diameter of the connecting module with a fixed PDMS thickness of 375 μm, and b the thickness of PDMS substrate with a fixed inner diameter of 12 mm. The square dots represent the averages of the measured relative variation in resistance depending on the averaged pressure load. The error bars along x- and y-axes represent the standard deviations of the measured values of pressure and relative resistance variation, respectively