FSRs are sensors that allow you to detect physical pressure, squeezing and weight. They are simple to use and low cost. This sensor is a Interlink model 408 FSR with a massive 1/4-inch x 24-inch sensing region. You can press anywhere along the strip and the pressure will be recognized. Note that this sensor can't detect where on the strip you pressed (for that, check out our ribbon soft pots).FSRs are basically a resistor that changes its resistive value (in ohms Ω) depending on how much its pressed....