Force sensing resistors fsr 400 series interlink electronics fsr402short this force sensing resistor fsr has an active area of oslash127mm and a thickness of just 046mm overall length is 305mm and the device has a actuating travel of 015mm the fsr is a robust polymer thick film pft sensor whose material exhibits a resistance change when a force or pressure is applied the sensitivity and performance of the fsr is optimised for use in human touch control applications such as aut