Flex-Sensor FRS402

FSR is a sensor that detects physical pressure, crush and weight. They are simple to use and cost effective. Heres a picture of an FSR, and the model below is 402. The 1/2 diameter part is the sensitive bit.
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Flex-Sensor FRS402Flex-Sensor FRS402
The FSR is separated by two layers, and as pressure increases these points contact the active semiconductor components, making the resistance smaller
Flex-Sensor FRS402
The FSR can be thought of as a resistor to change the value of its resistance, the resistance of which (in ohms Ω) depends on how much to suppress it. These sensors are relatively inexpensive and easy to use, but they are less accurate. They have a wide range of performance differences of only about 10%. So basically when you use FSR, you can only expect to get a response about the range. Although FSR can detect weight, it is not possible to select its specific weight data.
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Product specifications
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Size: Thick (0.48mm), the role of the area of ??12.7mm
Resistance Range: Unlimited / Open (no pressure), 100KΩ (rolling), 200Ω (maximum pressure)
Force range: 0.2 ~ 20N (can be extended to 10kg), the average surface area of ??0.125 square meters
Power: Use current less than 1mA (depending on pull-up / pull-down resistance and supply voltage)
Strength range per square centimeter: up to 636g / cm2; range 20N, or 2kg, the role of an area of ??about 3cm2, a minimum of about 10g / cm2