Force Sensing Resistors (FSR Sensors)

Force sensing resistors, also known as force sensitive resistors or FSR. They are basically a sensor that changes their resistance depending on the amount of pressure, force or stress applied to them. At their core, force sensing resistors are devices that decrease electrical resistance when more physical force or pressure is applied. The force sensing resistor consists of semiconducting ink/material placed between two thin substrates separated by a spacer. Because the sensing membrane is composed of semiconductors and insulators, applying pressure to the surface causes the ink to touch the conductive electrodes, changing the resistance.