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Pricelist: Retail Price (B2C) Pricelist
50kg Half-Bridge Load Cell - E-Shaped Weight Sensor for Digital Scales & Arduino

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

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ComponentRated CapacitySensitivityInput ResistanceLinearityRepeatabilityBridge Type
Value50 kg1.0 ± 0.1 mV/V1000 Ω0.03 %FS0.03 %FSHalf-Bridge
ComponentExcitationInsulationWire LengthMaterialWeightDimensions
Value5V - 10V DC≥ 5000 MΩ~30 cmAlloy Steel20 grams34 x 34 x 8 mm
Price
₹ 67.80 ₹ 67.80
(Tax included)

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.

Prototyping and Engineering Tips from Robogears

  • 9V Battery Use: Do not connect the load cell directly to a 9V battery. The sensor requires a stable 5V excitation from an HX711 module connected to your Arduino. If your project is battery-powered, use the Arduino's 5V regulated output.

  • 18650 Cell: For portable scales, use an 18650 cell (3.7V). The HX711 and this sensor will operate down to 2.6V, making them perfect for direct-lithium power without a boost converter.

  • IC & Capacitor Tip: To use a single 50kg sensor, you must create a "dummy" half-bridge using two 1k Ohm precision resistors connected to the HX711 A- input. For a 4-sensor setup, wire them in a loop (White to White, Black to Black) to form a full Wheatstone bridge.

  • Related Products: We recommend pairing this with the HX711 24-Bit ADC Module, 1k Ohm Precision Resistors, and a Load Cell Combiner Board for clean wiring.

Package Includes

  • 1 x 50kg Half-bridge Experiments Body Scale Load Cell Sensor.

Disclaimer Image is for ilastration purpose only 2-3 lines. Ensure the central part of the sensor is free to bend; mounting it flat against a surface will prevent it from measuring weight. Handle the delicate wires with care to avoid snapping them at the solder joints.