What is a scale sensor and how does it work?

　　scale sensor is one of the main categories or types of load cells commonly used in the weighing industry. Other types include, for example; compression, beam, and single point. As the name suggests, scale sensors are mainly used to measure tension or tension. Many people can also measure the compression ratio, which is very versatile due to its two-way sensitivity.

　　Stretch load cells are often called "S-type" load cells because of their shape. They have upper and lower arms to help align the mounting point with the central axis, which is essential in suspended applications.

　　Work criteria

　　Like all other modern load cells, scale sensors are essentially sensors that convert force or weight into electrical signals through strain gauges. When under load, the body of the load cell will be slightly deformed. A strain gauge that is firmly connected to the body of the load cell will also deform, thereby changing its resistance. This produces a voltage signal proportional to the initial force or weight.

　　design

　　scale sensors are designed to adapt to applications involving heavy objects. In this way, they usually need to be in line with the accessory object, which is usually integrated into the supporting device. The "S" or "Z" shape of these load cells is due to this requirement. Both upper and lower limbs ensure that the mounting holes are in line with the central axis.

　　In many ways, these are dedicated beam load cells. The role of the center rod is exactly the same as that of the beam load cell, and the position of the strain gauge can detect bending or shear strain. The difference is that the cantilever does not have a fixed end. For traditional beam load cells, one end is usually fixed on the base, and then the load is introduced to the other "free" end, just like a diving board. In the S-type tension sensor, both ends are not fixed, but one end is connected to the upper device through the upper arm, and the other end is connected to the lower device through the lower arm.

　　When the load cell is under tension, one side of the center rod will be pulled up, and the other end of the center rod will be pulled down in the same way. The difference in the center rod causes deformation, which is captured by a strain gauge.