Generic Force Sensitive Resistor RP-C5-LT (20g-1kg) - Thin Film Sensor

Connect the FSR in a simple voltage divider circuit: one pin to your microcontroller's analog input pin (e.g., A0), and the other pin to ground through a fixed-value pull-down resistor (typically 10kΩ). The FSR acts as a variable resistor; as force increases, its resistance decreases, causing the voltage at the analog pin to rise. Your code reads this ADC value to calculate the applied force.

The actuation force of 20g is the minimum force required to cause a measurable change in the sensor's resistance. The specification '20g Res. ≤200KΩ' indicates that when a 20g force is applied, the sensor's resistance will drop to 200 kilo-ohms or less. This defines the sensitivity threshold for reliable detection of light touches.

The RP-C5-LT can measure both static (constant) and dynamic (changing) forces. Its piezoresistive material provides a stable resistance output for a constant applied load, making it suitable for applications like simple weight measurement. For best accuracy with static loads, ensure your circuit and code account for any potential long-term drift.

The adhesive backing allows for secure, permanent mounting of the ultra-thin sensor onto surfaces without screws or clamps. Ensure the mounting surface is clean, flat, and dry. Peel the protective liner and press the sensor firmly into place. The adhesive helps maintain consistent mechanical coupling, which is crucial for accurate and repeatable force readings.