How do I know which load cell I need?

Load cells come in as many types as there are applications that use them. The supplier may ask you the first question when you order load cells:

“What weighing equipment will you use with your load cells?”

This first question will guide us on the next ones to ask. For example, we can ask, “Will the load cells replace an old system or are they part of a new one?” We may also ask, “Will these load cells work with a scale system or an integrated system?” and “Is it static or dynamic?”” “What is the application environment?” Having a general idea of load cells will help make the load cell buying process easier.

LCF500 Flat Ring Torsion Spoke Type Compression Load Cell

What is a load cell?

All digital scales use load cells to measure the weight of an object. An electrical current moves through the load cell. The scale bends or compresses a bit when someone adds weight or force to it. This changes the electrical current in the load cell. The weight indicator shows how the current changes. It displays this as a digital weight value.

Different types of load cells

All load cells work the same way. However, different uses need special features. These include surface finishes, styles, ratings, approvals, dimensions, and capacities.

LCF530DD Pancake Load cell

What type of seal does a load cell require?

Many techniques seal load cells to protect their internal electrical parts. Your application will determine which of the following types of seal is required:

environmental seal

welded seal

Load cells have an IP rating. This rating shows how well the load cell housing protects its electrical parts. The IP rating shows how well the housing keeps out dust and water.

LCF560 Weighing Cell Pancake Load Cell Force Sensor

Load cell construction/materials

Manufacturers can make load cells from a variety of materials. Aluminum is often used for single-point load cells with low capacity requirements. The most popular choice for load cells is tool steel. Finally, there is a stainless steel option. Manufacturers can seal stainless steel load cells. This protects the electrical parts. So, they are great for humid or corrosive places.

Scale system vs. integrated system load cell?

In an integrated system, a structure like a hopper or tank builds in the load cell. This setup converts the structure into a weighing system. A traditional weighing system has a special platform. You place an item to weigh it and then take it off. An example is a counter scale found at a deli counter. Both systems measure item weight. However, they made only one for this purpose. Knowing how you weigh items helps your scale dealer pick load cells or systems.

LCF605 Load cell 100kg Pancake Load Cell 500kg

What you need to know before buying load cells

When you order load cells next time, be ready with these questions for your scale dealer. This will help you make a better choice.

• What is the application?

• What type of weighing system do I need?

• What material should we make the load cell from?

• What is the minimum resolution and maximum capacity I need?

• What approvals does my application require?

Choosing the right load cell may seem complicated, but it doesn’t have to be. You’re the application expert – you don’t need to be a load cell expert, too. Knowing about load cells will guide your search and simplify the process. Rice Lake Weighing Systems has the biggest choice of load cells for every need. Our skilled technical support team is ready to help you through the process.

Need a custom solution?

Some applications require engineering consultation. A few questions to consider when discussing a custom solution are:

• Will strong or frequent vibrations expose the load cell?

• Will corrosive substances expose the device?

• Will high temperatures expose the load cell?

• Does the application require extreme load bearing capacity?