50kg Half-Bridge Load Cell - E-Shaped Weight Sensor for Digital Scales & Arduino

Product Description The 50kg Half-Bridge Load Cell Sensor is a precision strain gauge device commonly found in digital bathroom scales and industrial weighing systems. Designed with an E-shaped beam structure, this sensor converts mechanical force into a tiny electrical voltage change. Because it is a half-bridge sensor, it is most effective when used in groups of four to create a full Wheatstone bridge, allowing for a total capacity of 200kg. It features a durable alloy steel construction and is highly compatible with the HX711 24-bit ADC amplifier for interfacing with microcontrollers like Arduino and Raspberry Pi.

Key Features

• Scalable Capacity: Use one sensor for 50kg, two for 100kg, or four for a standard 200kg human body scale.

• High Precision: Offers 0.03% nonlinearity and repeatability, ensuring consistent measurements for DIY projects.

• Low Profile Design: At only 8mm thick, it is ideal for slim platform scales and space-constrained robotics.

• Simple 3-Wire Interface: Color-coded wires (Red, Black, White) simplify the connection to bridge completion circuits.

• Industrial Durability: Built with high-quality alloy steel to withstand repeated stress and environmental factors.

Technical Details

• Operating Principle: Uses a strain gauge affixed to the center beam that changes resistance when the beam bends under load.

• Excitation Voltage: Optimized for 5V DC, making it directly compatible with standard microcontroller power rails.

• Output Signal: Provides a differential millivolt output (typically 1mV per volt of excitation at full load).

• Wire Configuration: Red (Signal Output), Black (Common/GND), and White (Excitation/VCC).

• Load Application: Force must be applied to the outer side of the E-shaped beam while keeping the opposite side free to flex.

• Input Impedance: Standard 1000 Ohm internal resistance for low power consumption and high stability.

• Compensated Temp Range: Designed to maintain accuracy between -10°C and +40°C.

• Zero Balance: High-quality manufacturing ensures a very low zero-output offset for easier calibration.

• Non-destructive Overload: Can handle up to 120% of rated capacity without permanent deformation.

• Ultimate Overload: Structural integrity is maintained up to 150% of the rated load.

• Signal Stability: Shielded internal strain gauge protects against EMI/RFI interference in industrial settings.

• Mounting Versatility: Can be epoxied or mechanically fastened to wooden or metal scale bases.

• Hysteresis: Low hysteresis (<0.05 %FS) ensures the scale returns to zero accurately after weight is removed.

• Response Time: Fast mechanical response suitable for dynamic weighing or vibration monitoring.

• Standard Sizing: 34x34mm footprint matches most commercial digital scale replacement requirements.