Interlink Force Sensing Resistor has an active sensing area of 39.6
mm x 39.6 mm to sense applied force.
Force Sensing Resistors (FSRs) are very thin, robust, polymer thick
film (PTF) devices that decrease in resistance when increased pressure
is applied to the surface of the sensor. FSRs are not a load cell
or strain gauge devices though they have many similar properties.
They are more appropriate for qualitative rather than precision measurements.