Figure 3
From: Color-switching hydrogels as integrated microfluidic pressure sensors
2D pressure-sensing (a) Schematic of the chip for 2D pressure-sensing. The line indicates the cross-section of hue value averaging. (b) Average measured hue value profiles from images presented in (c). (c) Top view of the chip: the rectangular flow channel has the same width and length as the overlaid gel channel. The uniform pressure loading increases from top to bottom. Non-uniform pressure as imposed by a steady flow of liquid : (d) visual information and (e) reconstruction of the membrane deformation using the calibration obtained from images shown in (b).
