How do load cells and strain gages measure the amount of material in a tank?

Load cells and strain gages measure the amount of material in a tank by determining the weight of the material contained within it. A load cell is designed to convert the force of weight (from the material in the tank) into an electrical signal that can be quantified. When the load from the material exerts pressure on the load cell, it produces a measurable change in resistance or strain, which is then converted to a value representing weight.

Strain gages operate on similar principles. They detect changes in resistance that occur due to deformation of a material when subjected to stress or load. By bonding a strain gage to a structural element (such as a tank or its supports), any change in the weight of the material inside the tank translates to a change in strain measured by the gage. The resulting electrical signal is proportional to the weight of the material.

In contexts where accurate measurement of the content is needed, this direct measurement of weight is invaluable, as it allows for real-time monitoring and control of inventory or process parameters.