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. 2021 Mar 19;21(6):2157. doi: 10.3390/s21062157

Figure 5.

Figure 5

The sensor is composed of two flexible thermoplastic polyurethane materials; a non-conductive TPU filament (1) is used to print the substrate and encapsulant, and a conductive TPU filament (2) is used to print the capacitive plates. The sensor is assembled, shielded (3), and encapsulated in a stretchable fabric (5) to be implemented in a physical interface. A microcontroller unit (4) is integrated to measure capacitance.