The HX711 Weighing Pressure Sensor Module is a high-precision 24-bit ADC designed specifically for load cells and strain gauge–based weight measurement. It is widely used in digital weighing scales, force measurement systems, and IoT-based weight monitoring applications. With built-in amplification and simple two-wire communication, it enables accurate low-noise weight sensing using microcontrollers.
Core Module Specifications
• Sensor Interface: Load cell / strain gauge
• ADC Resolution: 24-bit
• Gain Options: 32, 64, 128
• Measurement Type: Weight / force / pressure
Electrical & Interface
• Operating Voltage: 2.6 V – 5.5 V
• Logic Level: 3.3 V / 5 V compatible
• Communication Interface: 2-wire (DT, SCK)
• Input Channels:
– Channel A (gain 128 or 64)
– Channel B (gain 32)
• Excitation Output: Onboard supply for load cell
Performance Characteristics
• High resolution suitable for small weight changes
• Low noise with selectable data rate
• Data Rate: 10 SPS or 80 SPS (configurable)
• Excellent stability for long-term measurements
Physical Characteristics
• Module Type: PCB-mounted ADC module
• Compact and lightweight form factor
• Clearly labeled pins for easy wiring
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32
• STM32, AVR, PIC microcontrollers
• Raspberry Pi GPIO
Key Advantages
• Integrated amplifier and ADC for load cells
• High accuracy and repeatability
• Simple interface with minimal wiring
• Widely supported by libraries and examples
Technical Insights
• Designed for Wheatstone bridge load cells
• Requires calibration for accurate weight readings
• Sensitive to power supply noise
• Shielded wiring improves measurement stability
Applications
• Digital weighing scales
• Electronic balances
• Load and force measurement
• Industrial weight monitoring
• IoT-based smart scales
Pro Tip
• Perform calibration using known weights
• Use stable power supply for consistent results
• Place HX711 close to the load cell to reduce noise
• Use averaging to smooth readings
Package Includes
• 1 × HX711 Weighing Pressure Sensor Module