A load cell is basically an electronic device which can help convert force into a signal. This means that the device helps convert force into a measurable electric output. The conversion process which is indirect happens in two phases. Since the load cells contain one, two or even four strain gauges, these are the ones that help transform the force into electric current.

 

Although strain gauges are the basic, there are other ways used such as fiber optic, hydraulic, pneumatic washer and button. Once the current is produced, it needs an amplification device before it can be used. These cells are normally used in weighing devices.

 

So, can one know which load cell to go for? To make your decision, you have to examine the different types of cells in details. With the hydraulic cells, one can get a weight range of up to 10,000,000 lb. The accuracy level is around 0.25%. The devices are also insensitive to temperature. However, they are complex to use and also very expensive.

 

Compression load cells are described by three main characteristics which are range, accuracy and overload. The range starts from 50 to 5000 kg. The accuracy is around 0.10% with a precision of 0.05%. A load cell in this category is shock-proof which means that happenings around cannot affect the readings. This makes it a great choice for areas such as building sites.

 

Another type is pneumatic which is a mechanical cell. It provides high accuracy levels and wide weight ranges. It is essentially safe as it contains no fluids. However, it has slow response rates and needs regular cleaning with hot air.

 

Article submited by Martin Stonningham, the views and opinions expressed in this article may not reflect the views of eilersen.com