2.2 Inch Flex Sensor | Hand Gesture Recognition

The 2.2 inch flex sensor is a thin strip that changes its resistance (the opposition to current flow) when you bend it. At rest, its flat resistance is 25K ohm. Bend the strip and resistance rises proportionally. The flex sensor connects easily to any analog pin on Arduino, ESP32 boards through a simple voltage divider circuit.

When using a flex sensor arduino setup, most beginners assume the resistance change is linear across the full bend range. It is not. The biggest resistance jump happens in the first 30 to 45 degrees of bending, and change slows down at sharper angles. So light bends are easier to detect precisely than extreme bends. The flex sensor 2.2 inch has a ±30% resistance tolerance, which means two sensors from the same batch can give different readings at the same angle. Always calibrate in code before mapping values to output. Operating voltage stays within 0 to 5V, so both 3.3V and 5V boards work without any level shifting.

Students, wearable project builders, and gesture control developers all reach for this flex sensor price point as an entry into analog bend sensing. Get started by connecting it in a voltage divider with a 10K resistor to any analog pin. StemVolt provides this sensor with trusted quality, ensuring reliable performance and easy usability.

Related Products:

• Check out the Force, Flex and Load Sensor

Features:

• Flat resistance of 25K ohm gives a clear baseline reading when sensor is straight
• Resistance tolerance of ±30% requires software calibration for accurate angle mapping
• Operating voltage of 0 to 5V works with both 3.3V and 5V microcontroller boards
• Continuous power rating of 0.5W keeps the strip from overheating during extended use

Technical Specifications:

Applications:

• A hand glove project uses this to detect finger bend and control a robot hand
• A musical instrument project reads bend angle and changes note pitch in real time
• A 2.2 inch flex sensor reads joint angle in a prosthetic finger movement system
• A hand gesture sensor reads wrist bend and sends commands to a drone controller

Package Includes:

• 1 x 2.2 Inch Flex Sensor