Description

FSRs are basically a resistor that changes its 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 sensor to sensor perhaps 10%. So basically when you use FSRs you should only expect to get ranges of response. FSRs are sensors that allow you to detect physical pressure, squeezing and weight. They are simple to use and low cost. This is a photo of an FSR, specifically the Interlink 402 model. The 1/2″ diameter round part is the sensitive bit.

Datasheet:FSR
Feature:
1.Size: 1/2″ (12.5mm) diameter active area by 0.02″ thick
2.Resistance range:100KΩ (light pressure) to 200Ω (max. pressure)
3.Force range: 0 to 20 lb. (0 to 100 Newtons) applied evenly over the 0.125 Sq in surface area
4.Power supply: Uses less than 1mA of current (depends on any pullup/down resistors used and supply voltage)