The Flex Sensor 2.2 inch is a resistive bend sensor designed to measure the amount of bending or flexing. Its resistance changes proportionally with the bend angle, allowing easy detection of motion, position, and deformation. Due to its thin, lightweight, and flexible structure, it is widely used in robotics, wearable electronics, gesture control, and human–machine interface projects.
Core Sensor Specifications
• Sensor Type: Resistive flex / bend sensor
• Sensor Length: 2.2 inch
• Operating Principle: Resistance variation with bending
• Output Type: Analog (resistance-based)
Electrical & Interface
• Operating Voltage: 3.3 V – 5 V (via voltage divider)
• Typical Flat Resistance: ~10 kΩ
• Bent Resistance: Increases with bend angle
• Interface Method: Analog input using voltage divider
• Connection Type: Solder pads / crimp connector
Performance Characteristics
• Smooth resistance change with bend angle
• Good repeatability for moderate bending
• Fast response time
• Suitable for low-frequency motion sensing
Physical Characteristics
• Sensor Length: 2.2 inch
• Construction: Flexible polymer substrate
• Thickness: Very thin and lightweight
• Bend Direction: One-directional sensing
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32
• Raspberry Pi (with external ADC)
• Wearable electronics platforms
• Robotics and motion control systems
Key Advantages
• Simple analog interfacing
• Lightweight and flexible design
• Low power operation
• Ideal for wearable and gesture-based projects
Technical Insights
• Requires a voltage divider for ADC reading
• Resistance change is not perfectly linear
• Over-bending can permanently damage the sensor
• Calibration improves accuracy and repeatability
Applications
• Gesture and motion detection
• Wearable electronics and smart gloves
• Robotics joint movement sensing
• Game and VR controllers
• Educational and DIY electronics projects
Pro Tip
• Do not bend sharply beyond rated angle
• Fix one end firmly for consistent readings
• Calibrate sensor for each application
• Use averaging to reduce noise in readings
Package Includes
• 1 × Flex Sensor 2.2 Inch