Square shaped Force Sensor
What Is a Square Force Sensor?
A force sensor that detects applied pressure or force on its surface.
Square-shaped versions are commonly FSR (Force Sensitive Resistor) sensors.
Output changes based on how much force is applied not just ON/OFF, but variable.
Key Features
Shape: Square sensing area (better for uniform pressure detection)
Thin & Flexible: Can be placed under surfaces or embedded in devices
Analog Output: Resistance changes with applied force
Lightweight & Durable
Wide Force Detection Range
Easy Interface with microcontrollers (Arduino, ESP32, etc.)
Technical Specifications (TypicalParameter Value Operating Voltage 3.3 V 5 V (via voltage divider) Output Type Analog (variable resistance) Force Range ~100 g to 10 kg (varies by model) Response Time <10 ms Thickness ~0.5 mm Resistance (No Force) >1 M Resistance (Full Force) ~1 k 10 k
How It Works
The sensor has a conductive polymer layer.
When force is applied, resistance decreases.
The change in resistance is converted into a voltage using a voltage divider.
A microcontroller reads this voltage via an
Basic Connection
One terminal VCC (through resistor)
Other terminal Analog pin + GND (via voltage divider)
Typical setup:
Use a fixed resistor (10k) to form a voltage divider.
Working Behavior
No Force High Resistance Low Output Voltage
More Force Lower Resistance Higher Output Voltage
(Non-linear response requires calibration for accurate force measurement)
Applications
Pressure sensing pads
Touch-sensitive buttons
Weighing (approximate force measurement)
Robotics grip sensing
Important Notes
Not Highly Accurate: Best for relative force, not precise weight measurement.
Non-linear Output: Requires calibration for better results.
Wear Over Time: Repeated pressure can reduce lifespan.
Temperature Sensitive: Readings can vary slightly with temperature.
Summary
Type: Force Sensitive Resistor (FSR)
Output: Analog (via resistance change)
Shape: Square sensing area
Use Case: Pressure/force detection in interactive and embedded sy