Three Types of Sealed Load Cells

There are different ways that load cells are sealed. Each method depends on your application needs.

• Hermetically Sealed
• Environmentally Protected
• Welded Seal

Why does it matter?

The method and material used to seal your load cell depends on your application needs. If the correct method is not chosen, this could lead to premature load cell failure.

Hermetically sealed load cells are best used when you need to keep moisture from entering the load cell. If your equipment is washed down regularly, exposed to dust or humidity changes, this will be the best seal type for your application.  Although this option can cost more, it may be the best option for applications with harsh conditions.

Environmental seals entail potting the cavity at the location of the strain gauge, then covering that potting and using washers and O-rings where the cables enter the load cell. These are best for normal indoor or outdoor applications that already have extra protection. This type of seal protects the load cell from moderate humidity, debris and dust.

Welded seal load cells are best for protecting the load cell from being wet occasionally, but not for a heavy washdown. They are similar to hermetically sealed, however, the load cell cable location is different. This type of load cell is also environmentally protected but with welded covers for additional protection from moisture and air. With this option, the gauge area is protected but the cable entry is not.

Rice Lake Weighing Systems offers a variety of load cells with all of these seals. We also have experts available to answer questions if you are not sure which load cell is best for your application needs.