The FSR-402 force sensitive resistor pressure sensor measures how much force is pressing on its surface. It is a round disc, 12.7mm in diameter, that changes resistance when you press it. Connect it to any 3.3V or 5V board and the ADC (analog-to-digital converter) reads the force level directly.
The FSR pressure sensor works because the two conductive layers inside squeeze together when force is applied. This lowers resistance and raises voltage at the output pin. The non-obvious part is that FSR sensors are not linear — light touches cause a large resistance drop while heavier force causes a smaller additional change. So calibrate your readings in code before use. At just 0.3mm thick, the fsr 402 force sensitive resistor slips under fabric, foam, or a 3D-printed shell without adding bulk.
Engineering students and embedded developers use this fsr force sensitive resistor pressure sensor for pressure-based interaction. started by connecting the sensor in a voltage divider with a 10K resistor to any analog pin. StemVolt provides this sensor with trusted quality, ensuring reliable performance and easy usability.
Related Product:
- Check out the 2.2 Inch Flex Sensor
Features:
- Round active sensing area of 12.7mm picks up fingertip-sized force inputs cleanly
- Works at 3.3V and 5V supply so no level shifting is needed for ESP32 or Arduino
- Sensor thickness of only 0.3mm allows embedding inside slim product casings easily
- Force sensitive resistor type gives analog resistance output for variable pressure reading
Technical Specifications:
| Specification | Details |
|---|---|
| Sensor Type | Force Sensitive Resistor |
| Model Number | FSR-402 |
| Sensing Area | Round Active Area |
| Response Time | <1 ms |
| Operating Voltage | 3.3V – 5V |
| Sensing Area Diameter | 12.7 mm |
| Thickness | 0.3 mm |
Applications:
- A science project uses this sensor to show how pressure changes on a display
- A smart button detects how hard a user presses and changes LED brightness
- Force sensitive resistor pressure sensor reads grip strength in a hand exercise device
- A musical instrument project maps press force to sound volume in real time
Package Includes:
- 1 x Force Sensitive Resistor Pressure Sensor
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