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A load cell is a device that converts a mass signal into a measurable electrical signal output. When selecting a sensor, it is crucial to consider the actual working environment of the sensor, as this affects whether the load cell can operate normally, its safety and lifespan, and even the reliability and safety of the entire weighing system. There are various styles, including S-type, single-point, cantilever, wheel hub, plate ring, diaphragm, bridge, and column types. Many customers often ask how to select a load cell and what issues to pay attention to during product selection. Let’s explore this together.
The main factors in selecting a load cell include four aspects: the sensor’s accuracy, sensitivity, stability, and the number and range of sensors used.
Requirements for Selecting Sensors
1. Sensor Accuracy
A good load cell has high accuracy requirements; the higher the accuracy, the higher the price. Generally, when selecting a sensor, it should meet the output requirements of the weighing system’s instrument, and it does not need to be excessively high; what meets your needs is the best.
2. Sensor Sensitivity
It is better to choose a sensor with higher sensitivity, as higher sensitivity will yield more accurate data during measurement.
3. Sensor Stability
Stability refers to the ability of the load cell to maintain normal operation after prolonged use. The higher the stability, the longer the lifespan of the sensor. Factors affecting sensor stability include the quality of the load cell and the working environment. A good load cell is less affected by environmental conditions.
When purchasing a load cell, it is essential to consider its applicable environment and select the corresponding load cell based on the environment. Choosing the correct load cell can reduce the impact of the environment on the load cell and benefit its lifespan. For example, in flammable and explosive environments, a load cell with explosion-proof features should be selected.
4. Number and Range of Sensors
In different weighing projects, the specific number and range of sensors should be determined based on the actual weight and type of the object being measured. Generally, the actual weight of the object should be below 70% of the sensor’s capacity to minimize wear and extend the sensor’s lifespan.
Considerations When Selecting Load Cells
1. Installation requirements for load cells; specific selection can be coordinated with our technical team to create a selection plan.
2. Pay attention to the environmental conditions of the load cell during purchase, such as those requiring sealing or explosion-proof versions.
3. Accuracy grade of the load cell, which is generally determined by the structure of the elastic element; check if there is linear compensation during processing.
4. Be aware of the range of the load cell; estimate the maximum load of the machine or platform. The selected range is generally 2 to 2.5 times the maximum weight of the object being measured, as this effectively extends the sensor’s lifespan and allows for more accurate measurement data.
5. Consider the temperature effects and creep characteristics of the load cell during use.
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Source: Songbai Sensors
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