Force Sensitive Resistor RP-L-600 (20g-10kg) - Flexible Pressure Sensor

The RP-L-600 outputs a variable resistance that decreases with applied force. To interface with an Arduino, create a simple voltage divider circuit by connecting the sensor in series with a fixed resistor (e.g., 10kΩ) between 5V and GND. Connect the junction between the sensor and resistor to an analog input pin (A0-A5). The Arduino's ADC will read a voltage proportional to the force.

The '20g actuation force' indicates the minimum detectable force threshold. At this light touch (approximately 20 grams of pressure), the sensor's resistance is typically around 10 MΩ. As force increases beyond this point, the resistance drops significantly, allowing the sensor to measure across its full 10kg range. This parameter defines the sensor's sensitivity to very light loads.

Yes, the RP-L-600 is rated for operation from -40°C to +85°C, making it suitable for many harsh environments. However, its flexible polymer sensing area is not inherently sealed. For outdoor or wet conditions, the sensor must be properly encapsulated or housed to protect it from direct moisture, dust, and UV exposure, which could degrade the conductive film over time.

Calibration involves mapping the analog reading from your microcontroller to known force values. Place known weights (e.g., 100g, 500g, 1kg, 5kg) on the sensor's active area and record the corresponding ADC values. Plot these points to create a calibration curve or lookup table. Due to the sensor's ±15% repeatability, it's recommended to calibrate each unit individually for high-precision applications.