The active sensing area is a 1" (2,5 cm) diameter circle at the end of the sensor. The conductive leads are easy to connect to a breadboard or through-hole area. The Flexiforce has an ideal output for A/D conversion - 0V is no force and 4.2V is 25 lbs (110N/11kg).
More information is available on the website of Sparkfun.
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