The working principle of a resistance strain gauge is based on the strain effect: when a conductor or semiconductor material undergoes mechanical deformation under external force, its resistance value changes accordingly. The strain gauge is attached to the object being measured so that it deforms with the object, causing the embedded metal foil to bend. Mechanical bending alters the resistance of many metals. Features - Color: As shown - Material: Modified phenolic substrate - Size: 3 × 1.5 cm - Operating voltage: 5 V - Analog output voltage: 0–3.5 V - Board size: 32 × 17 mm - Resistance: 350 Ω - Fatigue life: >10 million cycles - Soldering flux: Standard rosin solder - Strain limit: 2% - Reverse protection diode - Analog output - Zero-adjust potentiometer - Long fatigue life (>10 million cycles), exceeding that of similar products - Reverse protection diode safeguards connected equipment during abnormal conditions - Analog output enables direct signal reading and processing by downstream devices Note: Lighting conditions and display settings may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm. Package includes: 1 × Strain Gauge Bending Detection Test Sensor Module