Force sensing resistors fsr 400 series interlink electronics fsr400short this force sensing resistor fsr has an active area of oslash562mm and a thickness of just 030mm overall length is 158mm and the device has a actuating travel of 005mm 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