A force sensitive resistor (FSR) is comprised of a conductive polymer material pressed between two electrode layers, giving it the ability to electrically respond to changes in stress and strain. FSRs are often used in ergonomic or rehabilitation applications where pressure is applied from human interaction and the response is recorded or translated. Force sensitive resistors are incredibly useful for human interactivity because of their slim profile, inexpensive construction, and multiplicative geometries. The sensor presented here is the RP-S40-ST (datasheet can be found here), which is a 40mm x 40mm thin film FSR.

Included in the 40mm Force Sensitive Resistor Kit:

• 1x RP-S40-ST Force Sensitive Resistor

Features of the 40mm Force Sensitive Resistor (RP-S40-ST):

• 36mm x 36mm Active Sensing Area

• 0.42mm Thick

• 0.1N - 100N Force Sensitivity

• Adhesive Bottom to Prevent Slipping

• Compatible with Arduino and Raspberry Pi

Full tutorial on wiring and usage can be found here on our blog.