Ohmite Force Sensing Resistor 02Ah9088 - Piezoresistive FSR

Interface the FSR using a simple voltage divider circuit. Connect one FSR lead to your microcontroller's analog input pin (e.g., A0 on Arduino) via a pull-down resistor (typically 10kΩ). The other FSR lead connects to the logic voltage (3.3V or 5V). The voltage at the analog pin will vary proportionally with the applied force, which your code can read and map to a force value.

The Ohmite FSR exhibits a piezoresistive response, meaning its electrical resistance decreases non-linearly as the applied force increases. The relationship is inverse and approximately logarithmic; a small force produces a large resistance change, with the rate of change decreasing as force approaches the maximum 5 kg rating. Calibration for your specific application is recommended for precise measurements.

It is suitable for measuring both discrete force events (like button presses) and continuous, varying force. Its analog resistance output provides a continuous reading that can be sampled to monitor force changes over time. However, for highly precise, calibrated pressure measurement (e.g., in PSI or kPa), additional characterization and calibration against a known standard are required due to the sensor's non-linear response.

The Ohmite 02Ah9088 series is offered with multiple termination styles: bare leads for direct soldering, solder tabs for easier PCB mounting, or a pre-attached connector compatible with the Nicomatic 14106-12 series. The sensor itself is a thin, flexible film that can be adhered to a surface using double-sided tape or integrated behind a panel, with no active mounting hardware required.