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How to choose the right load cell for your project?

1, The weight capacity: In practical applications, the range of the weighing sensor is larger than the weight of the object to be measured. Generally, a sensor using 50-70% of the full range is best.

2, The accuracy: What kind of accuracy do you want during measurement?

3, The dimensions of a weighing tray or platform, The different sizes of load cells suitable for different platforms.

4, Installation space or the size of the load cell installation requirements

5, Working environment, temperature range, humidity, whether there is a corrosive environment

6, Static or dynamic weighing

7, You could tell us more information about your project, We have been in the load cell industry for many years and has rich experience, We could depend on your project to recommend a suitable load cell.

Load cell weighing module used for tank weighing system

The weighing system of the tank collects the weight of the tank by using the weighing module on the supporting feet of the tank. Several weighing modules are installed on the supporting feet of the tank. The data of multiple weighing modules are then transmitted to the instrument through the load cell junction box. The weighing indicator displays the weight of the entire system in real-time. The weighing indicator can also be added to the switch module, through the relay switch to control the tank feed motor. The instrument can also give RS485, RS232, or analog signal, the weight of the tank to the PLC and other control equipment.

How to connect of half bridge load cell with HX711

Each half-bridge load cell has three wires, Red, Black, and White. Just like the above picture, When connecting four half-bridge load cells to form a full bridge, The connect method is:

The white and white lines of the adjacent sensors are connected, and the black and black lines are connected. For the last four red lines, the corresponding two do power ±, and the other two do output signal ±.

Load cell FAQ

The load cell varies linearly from 0 to full range. The load cell has an index called linear error. From 0 to the full range, the linear error in the different intervals is different, our linear error is the maximum.

How to determine whether the load cell is damaged?

Measuring the input and output resistance of the load cell does not need to supply power to the sensor, the load cell generally has four wires, red and black on behalf of the power supply, and green and white on behalf of the signal output. Set the multimeter to 2KΩ resistance, measure the resistance of the red and black wires with the meter pen, this will measure the input resistance, and then measure the resistance of the green and white wires with the meter pen, this will measure the output resistance. The input and output resistances of the general weighing sensor are between 350 ~ and 1KΩ. If the input and output resistances measured by the multimeter are between 350 ~ and 1000Ω, it means that the sensor circuit is not damaged. If the multimeter shows 0 or O.L, It means the sensor line is damaged.