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Selection of load cell for electronic belt scale

Views: 0     Author: Site Editor     Publish Time: 2023-02-09      Origin: Site

The electronic belt weigher can complete the continuous, dynamic and automatic weighing and measuring work in the conveyor transportation process, and can be used in many occasions such as cement plants, building materials plants, environmental protection, steel, grain, etc. Due to the special application occasions and poor application conditions, and the electronic belt weigher itself relies on highly sensitive weighing sensors and speed sensors to collect terminal information, its measurement accuracy and working stability are also greatly affected. In the actual application process, the electronic belt scale will have inaccurate and unstable measurement accuracy.


First of all, we know that the belt scale is mainly used for measuring and weighing equipment, which is widely used in the market. The belt scale is mainly composed of three parts: scale body, weighing sensor and display instrument. As the belt weigher is mainly a weighing and measuring equipment, the selection of weighing sensor is particularly important. It can be said that the weighing sensor is equivalent to the brain of the belt weigher and plays a key role in the accuracy and stability of the belt weigher. Its role is to convert the quality signal to be measured into the corresponding electrical signal output and connect it to the display instrument to display the weight. Therefore, the selection of the weighing sensor of the belt weigher is very important; How to select the load cell of the belt scale correctly?


In addition to the requirements for high accuracy (0.03%~0.05% FS) of technical indicators such as nonlinearity, non repeatability, hysteresis, temperature drift of zero point and temperature drift of sensitivity coefficient, there are also the following special requirements for weighing sensor, which must be paid attention to when selecting weighing sensor.

1: The deformation of the sensor shall be small after loading. Because the vertical displacement D after bearing will change the belt tension, thus introducing measurement error. Therefore, the deformation of the sensor after loading should be set as an important technical index for selecting the sensor. The sensor quantity for electronic belt weigher is generally less than 300kg, and double hole and single hole sensors are generally preferred.

2: The sealing performance shall be good. Because of the bad site conditions and large dust of the belt conveyor, especially the transportation of corrosive materials, the sensor is required to have superior sealing performance, and the sealing performance should be paid attention to as well as the accuracy. 

3: It shall have large overload capacity. Generally, 1.5~2 times of the calculated load is selected as the selected range of the sensor, and overload protection device is set on the scale frame. Overload may be caused by uneven stacking or large pieces of materials.


When selecting the type of the load cell of the belt scale, it is necessary to consider the type of the scale body and the installation space to ensure proper installation and safe and reliable weighing. When selecting the load cell of the belt scale, it is necessary to first select the type and configuration with the technicians of the manufacturer of the belt scale to ensure that the load cell can get the maximum use value; On the other hand, it should also be noted that under special environmental conditions, the electronic belt weigher weighing sensor with high airtightness, that is, the bellows type weighing sensor, should be selected. Its characteristics are: high precision, good high bias load capacity, and strong overload protection capacity. Specific models include: LC338, LC339, LC332, etc. of Ningbo Chenbang. Generally speaking, the closer the measuring range of the weighing sensor of the electronic belt scale is to the load distributed to each weighing sensor of the electronic belt scale, the higher the weighing accuracy will be. The high temperature resistant load cell is often used for the load cell of the belt scale working in the high temperature environment; In addition, heat insulation, water cooling or air cooling devices must be added. When selecting the load cell of the belt scale, we should not only pursue the high-grade load cell, but also consider meeting the accuracy requirements of the belt scale and its cost. The actual working environment of the sensor shall be taken into consideration when selecting the load cell of the belt scale. This is crucial to the correct selection of the load cell of the belt scale. It is related to whether the sensor of the electronic belt scale can work normally, its safety and service life, and even the reliability and safety of the entire scale.

For the belt weighers in the current market, more and more people choose the bellows type weighing sensor, because the superior performance of the bellows type weighing sensor<anti eccentric load, anti overload, full laser sealing welding>enables the belt weigher to operate stably for a long time. Because of this, more and more belt weigher manufacturers will choose the bellows type weighing sensor with higher cost performance ratio.

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