Force Sensitive Resistor FSR

The FSR is made of 2 layers separated by a spacer. The more one presses, the more of those Active Element dots touch the semiconductor and that makes the resistance go down.FSRs are basically a resistor that changes their resistive value (in ohms Ω) depending on how much it is pressed. These sensors are fairly low-cost and easy to use but they're rarely accurate. They also vary some from the sensor to sensor perhaps 10%. So basically when you use FSRs you should only expect to get a range of responses. While FSRs can detect weight, they're a bad choice for detecting exactly how many pounds of weight are on them. However, for most touch-sensitive applications like "has this been squeezed or pushed and about how much" they're a good deal for the money!

Features of Force Sensitive Resistor

• Actuation Force as low as 0.1N and sensitivity range to 10N.
• Easily customizable to a wide range of sizes
• Highly Repeatable Force Reading; As low as 2% of initial reading with a repeatable actuation system