2.2 Inch Flex Sensor | Hand Gesture Recognition

A flex sensor is a variable resistor that changes resistance based on how far it bends. At rest in a flat position, this 2.2 Inch Flex Sensor reads 25 KΩ. As the sensor curves away from flat, that resistance climbs — the more it bends, the higher the resistance value at the output pins. That resistance change is linear enough to map bend angle through a simple voltage divider circuit and an analog input pin, making the flex sensor 2.2 inch one of the most straightforward bend-detection components available for microcontroller projects.

Operating voltage runs from 0–5V, so the flex sensor arduino connection uses a standard voltage divider — one fixed resistor in series, with the analog pin reading the midpoint voltage. The flex sensor 2.2 inch datasheet confirms flat resistance at 25 KΩ with a ±30% tolerance, which means individual sensors vary slightly. Calibration in software handles that variation — read the flat and fully bent values at startup, then map the range. Power rating sits at 0.5W continuous and 1W peak, so standard current through a 10 KΩ to 47 KΩ divider resistor keeps the sensor well within safe operating limits across hours of use.

The operating temperature range of -45°C to +80°C makes this hand gesture sensor usable beyond lab environments — outdoor robotics, cold-storage gloves, and under-bonnet automotive bend detection all fall within that range. The flex sensor price at 2.2 inch length makes it practical to equip all five fingers of a data glove build without high component cost. StemVolt provide this sensor for engineers and students working on gesture-controlled interfaces and wearable electronics projects.

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• Checkout BMP280 Barometric Pressure Sensor Module
• Explore 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:

• Engineers use 2.2 Inch Flex Sensor in five-finger data gloves for hand gesture controlled robot arms
• Flex sensor arduino voltage divider circuit reads finger bend angle for sign language translation projects
• Hand gesture sensor detects door hinge open and close angle in home automation monitoring builds
• Students use flex sensor 2.2 inch for college project gesture-controlled wheelchair and mobility devices
• Flex sensor price efficiency allows full five-finger glove builds without high per-unit component cost

Package Includes:

• 1 x 2.2 Inch Flex Sensor