Interlink Electronics FSR 402 Short Tail Membrane Pressure sensor - 18mm Round - Female Pin Headers

This sensor is able to measure pressure using the membranes that are incorporated in the sensor. The resistance of the sensor changes based on the pressure on the membrane. You can easily read the sensor on an analog input pin of a microcontroller with a simple voltage divider.

See the following page to get the sensor working with Arduino: How to use a Force Sensitive Resistor - Arduino Tutorial.

Check the tab "Downloads" for more information and/or downloads.