20Kg Load Cell
π Overview
The 20Kg Load Cell is a weight/force sensor that measures loads up to 20 kilograms.
π It is widely used in:
βοΈ Digital weighing scales
π€ Force measurement systems
π Industrial automation
π§ͺ Smart IoT weighing projects
π§ Working Principle
The load cell works using the concept of Strain Gauge:
Inside β metal beam with strain gauges
When weight is applied β beam deforms slightly
This changes electrical resistance
Output β very small voltage signal (mV range)
π Requires an amplifier like HX711 to read values
π Infographic Summary
ββββββββββββββββββββββββββββββββ
β βοΈ 20KG LOAD CELL β
ββββββββββββββββββββββββββββββββ€
β π― Measures: Weight/Force β
β π Capacity: Up to 20Kg β
β β‘ Output: mV signal β
β π Type: Wheatstone Bridge β
β π§ Tech: Strain Gauge β
β π§ Needs: HX711 Amplifier β
ββββββββββββββββββββββββββββββββ
π Wire Configuration
ββββββββββββββββββββββ
β 20Kg Load Cell β
ββββββββββββββββββββββ€
β Red β VCC (E+)
β Black β GND (Eβ)
β White β Signal β (Aβ)
β Green β Signal + (A+)
ββββββββββββββββββββββ
π Connect to HX711 module, then to microcontroller
βοΈ Key Specifications
π Capacity: 20 Kg
β‘ Output: 1β2 mV/V
π Configuration: Wheatstone Bridge
π― Accuracy: High (after calibration)
π Low power consumption
π Material: Aluminum alloy
π Key Features
βοΈ Accurate weight measurement
π§ Compact and durable
π Low noise output
π§ High sensitivity
π Easy integration with HX711
π§ͺ Applications
βοΈ Electronic weighing machines
π Smart shopping carts
π€ Robotics force sensing
π§ͺ Industrial automation
π§° Inventory weight monitoring
π₯ Kitchen scales
π Interfacing
Works with:
π΅ Arduino
π‘ ESP32 / ESP8266
π Raspberry Pi
π Flow:
Load Cell β HX711 β Microcontroller
π Working Flow
Weight applied
Load cell deforms
Resistance changes
HX711 amplifies signal
Microcontroller reads weight
β οΈ Important Notes
β οΈ Cannot connect directly to Arduino (signal too small)
β οΈ Needs calibration for accurate readings
β οΈ Avoid overload beyond 20Kg
β οΈ Must be mounted properly for correct measurement
π Load Cell vs Pressure Sensor
| Feature | Load Cell | Pressure Sensor |
|---|---|---|
| Measures | Weight/Force | Pressure |
| Output | mV signal | Analog/Digital |
| Accuracy | High | Moderate |
| Use Case | Weighing scales | Fluid/gas systems |
π‘ Pro Tip
Use calibration weight for best accuracy
Mount on a stable surface
Use multiple load cells for large platforms
π Perfect for building your own digital weighing machine
