The working principle of the resistance strain gauge is based on the strain effect produced when a conductor or semiconductor material undergoes mechanical deformation under external forces, causing a corresponding change in resistance value. The strain gauge is attached to the object being measured, allowing the strain to be transferred to the gauge, resulting in bending of the internal metal foil. Many metals exhibit a change in resistance during mechanical bending. Feature Material: Modified phenolic substrate Size: 3 x 1.5 cm Operating voltage: 5V Analog output voltage: 0–3.5V Board size: 32 x 17 mm Resistance: 350 Ohm Fatigue life: >10 million cycles Flux: Standard solder rosin Strain limit: 2% Reverse protection diode Analog output Zero potentiometer Long fatigue life, exceeding 10 million cycles, longer than similar products Reverse protection diode protects equipment and testing devices in emergency situations Analog output provides a direct signal that can be read and processed by downstream devices Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance: ±1–3 cm. Package list: 1 x Strain Gauge Bending Detection Test Sensor Module