Getting an accurate weight of materials is very important for many commercial and industrial applications today. This is why most companies turn to modern load cell technology for their industrial weight scales. But what exactly is a load cell, what types are there and why are they so valuable to industry today? Let’s take a closer look to see.
What are Load Cells?
Load cells have the ability to turn force into an electrical signal. They are also known as transducers. The signal load cells produce may be in the form of a change in voltage or electric current. With electronic signals, it may be a change of frequency, depending on the weighing needs.
How Do Load Cells Work?
There are two main kinds of electrical loads for load cells. They can either be resistive, or capacitive. A resistive load uses current in proportion to voltage. In other words, the circuit works only on resistance and when a weight is placed upon the scale, it changes the electrical resistance (which is reflected in the reading you receive).
When a capacitive load is energized, alternating current peaks before the voltage peaks. Instead of using resistance, it utilizes a change in the capacitance of the circuit. What is capacitance? Capacitance allows an electrical circuit to store energy. This is why capacitors can still emit electricity once removed from the circuit. In a capacitor system made with parallel plates, capacitance is proportional to the position of the plates, and this allows for accurate measurements of weight.
With most industrial weight scales, load cells need to be separate from the area which displays the weight (readings). Because load cells transfer the weighing data to the display unit, it’s possible to monitor weighing from just about any area you wish. This is not only convenient, but makes the job of weighing much easier. In fact, monitoring can be done wirelessly and over an Ethernet connection.
Strain gauge load cells are very common today. A special resistor within the unit stretches when weight is applied and contacts once it is removed. This change in position is easily measured. Here are some of the other types of cells:
* Push rod
* Shear beam
* Rope clamps
* S shaped
* Load pin
When you check out industrial weight scales for your company, choose an experienced provider known for quality scales and materials. They can help you select units which resist vibration and scales made for special commercial applications. This ensures you get the best possible equipment for your money with the least amount of hassles.
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