2.2" Flex Sensor – High-Precision Resistive Bend Sensor for Hand Gesture Recognition, Robotics, and Wearable Tech

Product Description The SpectraSymbol 2.2" Flex Sensor is a high-performance resistive component that changes its resistance based on the degree of its curvature. As the sensor is bent, the resistance across the terminals increases proportionally, providing a smooth analog signal that microcontrollers can easily interpret. This compact 2.2-inch version is specifically designed for localized joint tracking, making it the industry standard for VR haptic gloves, robotic finger control, and wearable health monitors. Its thin, flexible construction allows it to be sewn into fabric or taped to mechanical joints, providing precise biological or mechanical feedback without obstructing movement.

Key Features

• Linear Resistance Change: Provides a predictable increase in resistance as the bend angle increases from 0 to 180 degrees.

• Compact 2.2" Form Factor: Optimized for finger joints and small mechanical hinges where space is limited.

• High Durability: Engineered to withstand over 1 million bends, ensuring longevity in high-activity wearable applications.

• Low Profile Design: Extremely thin (0.43mm) and lightweight, making it virtually imperceptible when integrated into clothing.

• Simple Analog Interface: Easily integrated using a basic voltage divider circuit, requiring no specialized digital drivers.

Technical Details

• Base Resistance: Typically sits at a nominal 10k Ohms when completely flat and unflexed.

• Bending Resistance: Can reach between 60k and 110k Ohms at a full 180-degree bend, depending on the radius.

• Construction: Built on a flexible polyimide substrate with a carbon-based resistive element for consistent performance.

• Response Time: Offers an instantaneous mechanical-to-electrical response with negligible lag for real-time tracking.

• Power Capability: Rated for 0.5 Watts peak, though typical signal applications operate in the milliwatt range.

• Temperature Stability: Features a high-tolerance polyimide base that remains stable across extreme temperatures.

• Connector Spacing: Standard 2.54mm (0.1") pin spacing, making it compatible with breadboards and female headers.

• Sensitivity: Highly sensitive to even minor deflections, allowing for the detection of subtle finger movements.

• Mounting Flexibility: Can be mounted using adhesives, mechanical clamps, or integrated into custom-molded silicone parts.

• Mechanical Constraints: Designed to be bent in one direction (text facing out) for maximum accuracy and lifespan.

• Signal Quality: Passive resistive nature ensures zero electromagnetic interference, making it safe for medical wearables.

• Repeatability: High precision manufacturing ensures that the resistance returns to the base value consistently after flexing.

• Logic Compatibility: Works seamlessly with 3.3V and 5V ADCs found on Arduino, ESP32, and STM32 boards.

• Customizability: The non-active tail section can be secured to a rigid base to prevent stress on the electrical connections.

• Environmental Resistance: The polyimide coating protects the resistive element from sweat and humidity in wearable projects.