Shear Beam Load Cell By Shivay Sensor

A shear beam load cell is a common type of force sensor designed to measure force or weight by exploiting the principle of shear stress. It's widely used in various industrial weighing applications due to its accuracy, robustness, and versatility.

How They Work

A shear beam load cell typically consists of a rectangular or elongated metallic body, often made of alloy steel or stainless steel. When a load is applied, the beam experiences shear stress, particularly within a thin vertical "web" section that's precisely machined into its structure. This shear stress causes a minute, elastic deformation in the beam.

Strain gauges are strategically bonded to this "shear web" area. As the beam deforms under the applied load, these strain gauges stretch or compress, altering their electrical resistance. This change in resistance is then measured by a Wheatstone bridge circuit, which converts it into an electrical voltage directly proportional to the applied force or weight.

Types and Applications

Shear beam load cells come in two main configurations:

• Single-Ended Shear Beam Load Cells: These have one end fixed, and the load is applied to the opposite, free end, similar to a cantilever beam. They are compact and cost-effective, making them ideal for platform scales, bench scales, hopper weighing systems, and industrial processing equipment.

• Double-Ended Shear Beam Load Cells: These are supported at both ends, with the load applied at the center. This symmetrical design enhances load distribution, stability, and accuracy, especially for higher capacities. They are commonly found in truck scales, railway weighing systems, and heavy-duty industrial platforms.

Shear beam load cells are highly valued for their precision, durability, and resistance to side loads, making them essential for accurate weight and force measurement in demanding environments across various industries.