Load sensor

Start by matching capacity to your maximum expected load. This set includes 1 kg, 5 kg, 10 kg and 20 kg cells, all built from high-strength anodized aluminum with anti-corrosion finishes and four mounting holes for stable installation. Consider your target weight range and desired precision: higher capacity accommodates heavier items while preserving sensitivity, while smaller cells excel with lighter measurements. Each unit outputs a millivolt-level signal and pairs with the HX711 24-bit ADC module for digital readouts to microcontrollers such as Arduino, ESP32, or Raspberry Pi, powered by 2.7–5 V DC.

The HX711 module is a 24-bit precision ADC that converts the tiny voltages from the strain-gauge load cell into digital data your microcontroller can read reliably. It uses a two-wire serial interface (DT, SCK) and is compatible with common boards like Arduino, ESP32, and Raspberry Pi, enabling straightforward digital weighing. Connect red E+, black E-, white A-, green A+ to a 2.7–5 V supply, then calibrate with known weights and tare in your software to obtain accurate readings.

These load sensors suit DIY makers and light industrial measurement projects. For home builds, the 1 kg or 5 kg cells are ideal for creating a kitchen or hobby bench scale using an Arduino or ESP32. For more demanding setups such as small‑scale automation or IoT load monitoring, the 10 kg or 20 kg cells provide higher capacity while maintaining sensitivity, thanks to robust aluminum construction and four‑hole mounting for secure installation.

Mount the cell securely on a rigid surface using its four screw holes to avoid bending or stress. Connect the wiring exactly as color-coded (Red E+, Black E-, White A-, Green A+) and power the module with 2.7–5 V. Keep the environment within -10°C to +80°C and away from moisture; regularly inspect connections and the aluminum finish for signs of corrosion. Proper mounting, stable electrical connections, and avoiding overloading beyond capacity are key to reliable long-term operation.

Beyond the load cell and HX711 module, you typically add a compatible microcontroller (Arduino, ESP32, or Raspberry Pi), a stable power source, and a solid mounting surface to hold the assembly. The HX711 provides digital output to your program, so you’ll implement calibration and tare in software. This combination creates a complete weighing solution suitable for building electronic scales, force measurement systems, and IoT‑enabled load monitoring projects.

All units advertise high sensitivity with low-noise output, and the included 24-bit HX711 converter handles the data consistently across capacities. Accuracy hinges on proper calibration, secure mounting, and staying within the rated capacity, so select a sensor that leaves headroom for your heaviest expected load. With correct setup, a 1 kg cell will yield precise readings for light tasks, while a 20 kg cell remains accurate for heavier weighing applications.