The BDD Flex Sensor 4.5 Inch (11.4cm) is a high-sensitivity, ultra-thin resistive bending sensor designed to measure physical flexing and angular displacement in a wide range of motion-sensing and human-interaction applications. Based on proven flexible printed circuit technology, this sensor converts mechanical bending into a measurable change in electrical resistance, enabling accurate detection of movement and curvature.
When the sensor is straight, it maintains a nominal resistance of approximately 10K ohms ( 30%). As it bends, the resistance increases proportionally, reaching at least twice the flat resistance at a full 180 bend. This predictable response makes it ideal for translating physical motion into analog signals that can be processed by microcontrollers, ADC circuits, and embedded systems.
At 4.5 inches (11.4 cm) in length, this extended version offers a larger sensing area compared to shorter flex sensors, allowing for improved sensitivity and smoother motion detection across longer surfaces or joints. It is particularly suitable for applications where larger range-of-motion tracking is required.
The sensor features a 0.1-inch pitch connector, making it fully compatible with breadboards and standard electronic prototyping systems. Its ultra-thin profile of just 0.43mm allows it to be integrated into compact and wearable designs without restricting movement or adding bulk.
With a durability rating of over 1 million bending cycles, the BDD Flex Sensor is engineered for long-term use in both consumer and industrial environments. It operates reliably across a wide temperature range from -35 C to +80 C, ensuring consistent performance under varying conditions.
Proper installation is essential for optimal performance; the base of the sensor should be securely mounted while only the active sensing region is allowed to flex. This helps maintain accuracy and prolong sensor lifespan.
Originally popularized in motion-control and wearable technologies, flex sensors like this are widely used in robotics, gaming interfaces, rehabilitation devices, and interactive electronics where human movement needs to be captured and interpreted.
Key Features
- Part Number: BDD Flex Sensor 4.5 Inch
- Flexible resistive bending sensor
- Length: 4.5 inches (11.4 cm)
- Measures angle displacement and motion
- Flat resistance: ~10K ohms ( 30%)
- Resistance increases with bending
- Ultra-thin and lightweight construction
- Durable with over 1 million cycles lifespan
- Breadboard-friendly 0.1" connector spacing
- High sensitivity and reliable response
- Easy integration with microcontrollers
- Wide operating temperature range
- Ideal for motion and position sensing
Applications
- Robotics and automation systems
- Wearable motion tracking devices
- Gaming and virtual input systems
- Medical rehabilitation equipment
- Prosthetics and assistive devices
- Gesture recognition systems
- Musical instrument controllers
- Human-machine interfaces
- Physical therapy monitoring
- Educational electronics projects
- DIY motion sensing systems
- Interactive installations
Technical Specifications
- Model: BDD Flex Sensor 4.5 Inch
- Device Type: Bending / Flex Sensor
- Sensing Principle: Resistive flex measurement
- Length: 4.5 inches (11.4 cm)
- Flat Resistance: 10K ohms 30%
- Bend Resistance: 2× flat resistance at 180 bend
- Power Rating: 0.5W continuous, 1W peak
- Thickness: 0.43 mm
- Operating Temperature: -35 C to +80 C
- Lifecycle: >1,000,000 cycles
- Connector Type: 0.1-inch pitch (breadboard compatible)
Benefits
- Accurate measurement of bending and motion
- Larger sensing area for improved detection range
- Ultra-thin and flexible for wearable use
- Long operational lifespan
- Simple resistive output for easy interfacing
- Suitable for compact and ergonomic designs
- Reliable performance in continuous-use applications
Summary
The BDD Flex Sensor 4.5 Inch is a durable and highly responsive bending sensor designed for precise motion detection and angle measurement. With its extended sensing length, ultra-thin construction, and long lifespan, it is ideal for robotics, wearable technology, gaming systems, medical devices, and interactive electronics requiring accurate and reliable flex sensing.
What's in the box
1 x BDD 4.5 Inch Flex Sensor Bending Sensor 11.4cm 10K Ohm Angle Module
