Sensors & Modules
The DFRobot SEN0296 (RP-S40-ST) is a square, ultra-thin flexible force-sensitive resistor (FSR) featuring a 40 × 40 mm active sensing area. It converts applied static or dynamic mechanical pressure into a inverse change in electrical resistance, decreasing from >10 MΩ down as force increases up to 10 kg.
Specifications:
- Sensor Type: Square Flexible Thin Film Force Sensitive Resistor (FSR / Pressure Sensor)
- Pressure Measurement Range: 20 g to 10 kg
- Trigger Force: <20 g (Triggers when default resistance <200 kΩ)
- Measurement Principle: Piezoresistive thin-film force-to-resistance conversion
- Initial Resistance: >10 MΩ (Unloaded)
- Output Signal: Variable Analog Resistance (Requires voltage divider circuit for MCU interface)
- Response Time: <10 ms
- Activation Time: <0.01 s
- Hysteresis: +10% (at 1000g force)
- Mechanical Lifespan: >1,000,000 actuations
- Operating Temperature: -40°C to +85°C
- Sensor Thickness: 0.45 mm
- Active Sensing Area: 40 x 40 mm

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