A load cell 40kg (sometimes called a weight sensor or a strain gauge) is a type of transducer that converts force or pressure into an electrical signal that can be measured and standardized. It can measure the weight of objects up to 40kg by detecting the change in electrical resistance that occurs when the load cell is deformed by the applied force.
The load cell 40kg consists of a metal bar (usually made of aluminum-alloy) that has four strain gauges attached to it. A strain gauge is a thin metal foil that changes its resistance when it is stretched or compressed. The four strain gauges are connected in a wheatstone bridge formation, which is a circuit that can measure small changes in resistance. The wheatstone bridge has four wires: red for VCC, black for GND, green for signal positive, and white for signal negative.
The load cell 40kg can be used with an amplifier module, such as the HX711, which is a 24-bit analog-to-digital converter (ADC) designed for weighing scales and industrial control applications. The HX711 amplifies the signal from the load cell and converts it into a digital value that can be read by a microcontroller, such as an Arduino. The microcontroller can then process the data and display the weight on an LCD screen or send it to other devices via serial communication or wireless connection.
The load cell 40kg can be used for various applications, such as weighing scales, industrial automation, robotics, medical devices, and more. It is a general-purpose load cell that can sense the weight of any object placed on it, as long as it does not exceed its capacity of 40kg.
Features
- General-purpose load cell for weight sensing up to 40kg
- Strain gauge technology that converts force into electrical signal
- Wheatstone bridge circuit that measures small changes in resistance
- Four-wire connection for easy interfacing with amplifier module and microcontroller
- Aluminum-alloy material that is sturdy and durable
Specifications
- Capacity: 40kg
- Size: 130 x 30 x 22 mm
- Wire colors: Red (VCC), Black (GND), Green (Signal +), White (Signal -)
- Output sensitivity: 1.0 ± 0.15 mV/V
- Non-linearity: ±0.03% F.S.
- Hysteresis: ±0.03% F.S.
- Repeatability: ±0.02% F.S.
- Creep: ±0.02% F.S./30min
- Zero balance: ±1% F.S.
- Input resistance: 1000 ± 50 Ω
- Output resistance: 1000 ± 50 Ω
- Insulation resistance: ≥2000 MΩ
- Operating temperature: -20°C ~ +65°C
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