Tekscan FlexiForce A502 Ultra Thin Force Sensor - 0-222 N Range, 2-Pin Male Square Pin Connector

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

The dynamic range is adjustable by changing the external drive voltage and feedback resistor. To measure higher forces, use a lower drive voltage (e.g., -0.5V) and a smaller feedback resistor (minimum 1kΩ). To measure lower forces with higher resolution, use a higher drive voltage (up to 1.25V) and a larger feedback resistor. This allows you to tailor the sensor's sensitivity to your specific application.

While its standard calibrated range is 0-222 N (50 lb), the A502 sensor is capable of withstanding loads up to 44,482 N (10,000 lb) without permanent damage. Exceeding the standard range will result in non-linear output, but the robust polyester construction protects the sensing element. For measurements within the linear region, it is recommended to stay within the 0-222 N range with proper circuit tuning.

The sensor operates reliably from -40°C to +60°C. The sensing element is laminated within a polyester substrate, providing protection against dust and incidental moisture. However, it is not hermetically sealed or rated for IP immersion. For use in wet or oily environments, an additional protective membrane or coating over the active area is recommended.