RFP602 (Made in China) Resistive Thin-Film Pressure Sensor (1kg/2kg/5kg Optional) – High Precision, Durable Force Detection

Description

The RFP602 is a single-point, round-shaped resistive thin-film pressure sensor that detects physical pressure, squeezing, and weight. It uses the piezoresistive principle: when force is applied to the sensing area, the internal conductive particles come closer together, decreasing the sensor’s resistance. By placing the sensor in a voltage divider with a fixed resistor, this resistance change is converted into an analog voltage that a microcontroller can read .

The sensor is ultra-thin (0.2mm) and flexible, with a polyester film construction. It is available in 1KG, 2KG, and 5KG force range options, making it suitable for applications such as game controllers, musical instruments, medical device controls, robotic grippers, and human-machine interfaces . The sensor has a rated service life of more than 500,000 actuations and a microsecond-level response time .

A 4-pin module variant (with VCC, GND, DO, and AO) is also available, which adds a comparator circuit for digital threshold output alongside the analog output . If you are selling the bare sensor, state this clearly—the bare sensor requires an external resistor.

Critical limitations: This is not a precision load cell. The resistance-force relationship is non-linear, and the sensor provides relative force detection, not calibrated weight measurement . The Chinese supplier does not publish detailed accuracy or repeatability specifications for the RFP602, so calibration against known forces is required for any quantitative application. Excessive force beyond the rated range will permanently damage the sensor .

Features

• Piezoresistive Thin-Film Sensing: Resistance decreases with applied force; simple voltage divider interface .

• Multiple Force Range Options (1KG / 2KG / 5KG): Select the variant matching your expected load .

• Ultra-Thin and Flexible (0.2mm): Suitable for integration into tight spaces and curved surfaces .

• Circular Sensing Area (10mm diameter per manufacturer): Compact active zone for fingertip or small-object pressure detection .

• Long Service Life: Rated for more than 500,000 actuations .

• Fast Response: Microsecond-level response time .

• Two-Wire Passive Interface: No polarity; no power supply required for the sensing element.

• Module Variant Available (4-pin): Some listings include a comparator module with both analog and digital outputs .

Technical Specifications