20Kg Load Cell Documentation

Component Name

20Kg Load Cell

Overview

The 20Kg Load Cell is a high-precision sensing component designed to measure weights or loads up to 20 kilograms. This strain gauge-based load cell is widely used in various industrial, commercial, and research applications where accurate weight or force measurement is critical.

Functionality

The 20Kg Load Cell is a transducer that converts mechanical load or weight into an electrical signal. When a load is applied to the load cell, it causes a minute deformation in the strain gauge, which results in a proportional change in the electrical resistance of the gauge. This resistance change is then converted into a voltage signal, which is proportional to the applied load.

Key Features

High Accuracy: The 20Kg Load Cell offers high accuracy, with a typical error of 0.1% of the full scale, ensuring reliable and precise weight measurements.
High Resolution: The load cell provides a high resolution of 0.1g, allowing for precise measurements of even small weight changes.
Wide Operating Temperature: The load cell operates accurately across a wide temperature range of -20C to 40C, making it suitable for use in various environments.
Low Power Consumption: The load cell requires low power to operate, typically 5-10V DC, which helps to reduce power consumption and heat generation.
Robust Construction: The load cell is built with a rugged stainless steel construction, ensuring durability and resistance to corrosion and mechanical stress.
Compact Design: The load cell has a compact design, making it easy to integrate into existing systems or devices.
Easy Calibration: The load cell can be easily calibrated using a calibration certificate or through a calibration process using a known weight.
Multiple Interface Options: The load cell can be connected to various interfaces, including analog, digital, and serial interfaces, making it compatible with a range of devices and systems.

Capacity

20 Kg

Accuracy

0.1% of full scale

Resolution

0.1g

Operating Temperature

-20C to 40C

Power Supply

5-10V DC

Output Signal

Analog (0-10V or 4-20mA)

Measurement Range

0-20 Kg

Non-Linearity

0.1% of full scale

Hysteresis

0.1% of full scale

Creep

0.1% of full scale per 10 minutes

Applications

The 20Kg Load Cell is suitable for a wide range of applications, including

Industrial weighing and measurement systems

Medical devices, such as hospital beds and wheelchairs

Commercial weighing scales and balances

Research and development projects, such as material testing and analysis

Robotics and automation systems

IoT-based weight and force measurement systems

Pin Configuration

20Kg Load Cell Documentation
Pin Description
The 20Kg Load Cell has 4 pins, which are used to connect the load cell to a microcontroller or a dedicated amplifier circuit. The pins are explained below:
Pin 1: E+ (Excitation Positive)
Function: Provides positive excitation voltage to the load cell bridge circuit.
Typical Voltage: 5V or 10V, depending on the load cell's excitation voltage requirement.
Connection: Connect to the positive terminal of the power supply or the output of a voltage regulator.
Pin 2: E- (Excitation Negative)
Function: Provides negative excitation voltage to the load cell bridge circuit.
Typical Voltage: 0V or -5V, depending on the load cell's excitation voltage requirement.
Connection: Connect to the negative terminal of the power supply or the output of a voltage regulator.
Pin 3: S+ (Signal Positive)
Function: Outputs the amplified signal from the load cell bridge circuit, proportional to the applied load.
Typical Signal: Analog voltage signal, typically in the range of 0-5V or 0-10V.
Connection: Connect to the input of an analog-to-digital converter (ADC) or an amplifier circuit.
Pin 4: S- (Signal Negative)
Function: Outputs the reference voltage for the signal output, typically connected to the ground or a reference voltage.
Typical Signal: Analog voltage signal, typically 0V or a reference voltage.
Connection: Connect to the ground or a reference voltage, depending on the application.
Connection Structure
To connect the 20Kg Load Cell, follow the steps below:
1. Excitation Voltage Connection
Connect Pin 1 (E+) to the positive terminal of the power supply (e.g., +5V).
Connect Pin 2 (E-) to the negative terminal of the power supply (e.g., 0V or -5V).
2. Signal Output Connection
Connect Pin 3 (S+) to the input of an analog-to-digital converter (ADC) or an amplifier circuit.
Connect Pin 4 (S-) to the ground or a reference voltage, depending on the application.
3. Power Supply Decoupling (Optional)
Add decoupling capacitors (e.g., 100nF) between Pin 1 (E+) and Pin 2 (E-) to filter out noise and ensure stable excitation voltage.
Important Notes
Ensure the power supply voltage meets the load cell's excitation voltage requirement.
Use a proper voltage regulator and decoupling capacitors to ensure a stable power supply.
The load cell's signal output may require amplification or conditioning before connecting to a microcontroller or other devices.
Refer to the load cell's datasheet for specific connection guidelines and recommendations.
By following this pin description and connection structure, you can properly connect the 20Kg Load Cell to your application, ensuring accurate and reliable weight measurements.

Code Examples

20Kg Load Cell Documentation

Overview

The 20Kg Load Cell is a high-precision weighing sensor designed for measuring weights up to 20 kilograms. It is a crucial component in various IoT applications, such as industrial automation, robotics, and smart scales. The load cell provides an analog output signal proportional to the applied weight, making it easy to integrate with microcontrollers and other digital devices.

Technical Specifications

Capacity: 20 kg
 Sensitivity: 1.0  0.1 mV/V
 Excitation Voltage: 5-10 V DC
 Output Signal: Analog (varying voltage)
 Accuracy: 0.5% of full scale
 Operating Temperature: -10C to 50C

Pinout

VCC: Power supply (5-10 V DC)
 GND: Ground
 S OUT: Analog output signal
 E+ and E-: Excitation voltage connections

Example 1: Arduino-based Weighing Scale

In this example, we will connect the 20Kg Load Cell to an Arduino Uno board to create a simple weighing scale.

Hardware Requirements:

20Kg Load Cell
 Arduino Uno board
 Breadboard
 Jumper wires
 Power supply (5-10 V DC)

Software Requirements:

Arduino IDE

Code:
```c
const int loadCellPin = A0;  // Analog input pin for load cell signal
const int vccPin = 5;  // Power supply pin for load cell
const int gndPin = GND;  // Ground pin for load cell

void setup() {
  Serial.begin(9600);
  pinMode(vccPin, OUTPUT);
  pinMode(gndPin, OUTPUT);
  digitalWrite(vccPin, HIGH);
  digitalWrite(gndPin, LOW);
}

void loop() {
  int sensorValue = analogRead(loadCellPin);
  float weight = (sensorValue  5.0 / 1023.0)  20.0;  // Calculate weight in kilograms
  Serial.print("Weight: ");
  Serial.print(weight, 2);
  Serial.println(" kg");
  delay(1000);
}
```
Example 2: Raspberry Pi-based Industrial Automation

In this example, we will connect the 20Kg Load Cell to a Raspberry Pi board to create an industrial automation system for monitoring and controlling weights.

Hardware Requirements:

20Kg Load Cell
 Raspberry Pi board
 Breadboard
 Jumper wires
 Power supply (5-10 V DC)

Software Requirements:

Raspbian OS
 Python 3.x

Code:
```python
import RPi.GPIO as GPIO
import time

# Set up GPIO pins
GPIO.setmode(GPIO.BCM)
vccPin = 17
gndPin = 23
loadCellPin = 18

GPIO.setup(vccPin, GPIO.OUT)
GPIO.setup(gndPin, GPIO.OUT)
GPIO.output(vccPin, GPIO.HIGH)
GPIO.output(gndPin, GPIO.LOW)

# Set up ADC for load cell signal
adc_channel = 0
adc_resolution = 12

try:
    while True:
        # Read load cell signal
        adc_value = GPIO.input(loadCellPin)
        weight_voltage = adc_value  5.0 / (2  adc_resolution)
        weight = weight_voltage  20.0 / 5.0  # Calculate weight in kilograms
        print("Weight: {:.2f} kg".format(weight))
        time.sleep(1)

except KeyboardInterrupt:
    GPIO.cleanup()
```
These examples demonstrate how to use the 20Kg Load Cell with popular microcontrollers like Arduino and Raspberry Pi. The load cell's analog output signal is converted to a digital weight value, which can be easily integrated into various IoT applications.