How to choose the appropriate weighing sensor for the weighing instrument?

Want to choose the appropriate one for the weighing instrumentLoad CellIt is necessary to consider many factors, such as the required number and range of load cells, the working environment of the sensors, the type of load cell to be selected, and the accuracy requirements of the sensors, before finally selecting the appropriate brand and model.

1、 Determine the required number and range of load cells

The number of weighing sensors required should be determined based on the purpose of the scale and the number of points that the scale body needs to support. The number of support points for the scale body should be determined based on the principle of making the geometric center of gravity of the scale body coincide with the actual center of gravity. Generally speaking, the number of load cells is equivalent to the number of support points on the scale body, depending on the actual situation.

The range of the weighing sensor should be determined based on a comprehensive evaluation of factors such as the maximum required weighing value of the scale, the number of sensors selected, the self weight of the scale body, the possible maximum bias load, and dynamic load. If you want to ensure the accuracy of weighing data, it is best to choose a range that is close to the required load for the sensor. The closer it is, the more accurate the weighing data will be. It should be noted that the load borne by the sensor not only includes the weight of the object being weighed, but also includes loads such as the weight of the scale body, tare weight, eccentric load, and vibration impact. Instantaneous overload of the weighing sensor can also cause damage, so careful calculation is necessary.
　

2、 Determine the type of load cell required

Sensor manufacturers generally specify the applicable range of sensors based on their stress conditions, performance indicators, installation forms, structural forms, and elastic material characteristics, such as cantilever beam sensors suitable for pricing scales, platform scales, and desk scales; The cantilever beam sensor is suitable for hopper scales, electronic belt scales, sorting scales, etc; Bridge type sensors are suitable for track scales, weighbridges, overhead crane scales, etc; Column type sensors are suitable for truck scales, dynamic track scales, large tonnage hopper scales, etc.

3、 Understand the working environment of the weighing sensor

The operating environment of some weighing instruments is relatively harsh, so the working environment in which the weighing sensors are located also needs to be considered, which is related to the safety and service life of the sensors.

If in a highly corrosive environment, it is necessary to choose a weighing sensor with good corrosion resistance and airtightness; In humid environments, it is necessary to choose weighing sensors with higher protection levels; In flammable and explosive environments, it is necessary to choose explosion-proof type load cells, etc.