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Round Force-Sensitive Resistor (FSR) [Interlink 402]

Round Force-Sensitive Resistor (FSR) [Interlink 402]

We have ✅ 2 available of the AF-166 in our Sydney warehouse. An extra 100 units available with a short lead time.

Express post delivery (2-5 business days)

The Interlink 402 is a round force-sensitive resistor (FSR) with a 12.7 mm (0.5″) sensing area. It changes resistance based on applied pressure — the harder you press, the lower the resistance — making it a simple, low-cost way to detect physical pressure, squeezing, and weight in your projects.

FSRs provide a range of response rather than precise measurements, with approximately ±10% variation between sensors. They're ideal for detecting relative force (light touch vs. hard press) but not suited for exact weight measurement. Connect using a breadboard, alligator clips, female headers, or terminal blocks — soldering directly to the tabs risks melting the plastic and damaging the sensor.

Key Features

  • 12.7 mm (0.5″) Round Sensing Area – Compact force detection zone
  • Variable Resistance – Decreases with applied pressure
  • Simple Analogue Interface – Read with any microcontroller's ADC pin
  • Low Cost – Affordable pressure sensing for prototypes
  • Flexible Plastic Construction – Thin and easy to mount
Warning: Do not solder directly to the FSR tabs unless you are confident in your soldering skills. The plastic material melts quickly — use a breadboard, clamp connector, or terminal block instead.

Ideal For

  • Touch and pressure detection in interactive projects
  • Wearable electronics and e-textiles
  • Musical instruments and game controllers
  • Squeeze and grip detection

Package Contents

  • 1× Round Force-Sensitive Resistor (Interlink 402)

Resources

The Round Force-Sensitive Resistor (FSR) [Interlink 402] appears in the following collections:

SKU AF-166
by Adafruit