Tekscan FlexiForce A301-25 Force Sensor - 0-25 lb Range, 2-Pin Connector

The sensor acts as a variable resistor. Create a voltage divider circuit by connecting one sensor pin to your microcontroller's analog input pin (e.g., A0) and the other to ground. Place a fixed-value resistor (e.g., 10kΩ to 1MΩ, depending on desired sensitivity) between the analog pin and the 5V or 3.3V supply. The analog reading will vary with applied force. Calibration with known weights is required to map readings to force values.

Yes, the dynamic range is highly adjustable. The nominal 0-25 lb range is based on a standard circuit. You can modify the sensitivity and maximum detectable force by changing the drive voltage supplied to the sensor and the value of the feedback resistor in your conditioning circuit. A higher value feedback resistor will increase sensitivity for lower forces, while a lower value will extend the range for higher forces.

The sensor uses a polyester substrate. Polyester provides excellent mechanical durability, flexibility, and dimensional stability. This ensures the sensor can withstand repeated bending and force cycles without cracking or permanent deformation, leading to reliable, repeatable measurements over the product's lifetime. It also allows the sensor to conform to slightly curved surfaces.

The circular sensing area defines the active region where force is measured. This ensures that measurements are consistent and repeatable, as force applied outside this area will not be detected. For accurate results, ensure the force is applied as uniformly as possible across this specific zone. This design is ideal for point-load measurement applications.