WORKING PRINCIPLE OF S-TYPE LOAD CELL
S-type load cells are mainly used to measure tensile forces, but also are suitable for compressive force measurement. As the name implies, these load cells are shaped like the letter S. The spring element is located in the centre beam of the load cell. This element is a piece of metal that is elastically deformed under load and recovers the moment the load is removed. This deformation or strain is picked up by strain gauges installed on the spring element and converted into an electrical signal. In S-type load cells, the spring element is deformed at both ends by compression or tension. In contrast to other load cells, S-type load cells can be calibrated in weight units and also in Newton, as they are widely used as force transducers.
S-type load cells are commonly used in weighting equipment for small to medium loads up to 1 ton. They are installed in hybrid scales, silo scales, crane scales, big bag weighing equipment, hanging container scales and similar devices, and also serve as force transducers in tensile strength and fatigue testing machines.
As S-type load cells are mainly used in industrial applications, they are designed to withstand harsh ambient conditions. S-type load cells meet the requirements of IP65 to IP68 (protection from dust ingress, slash water, splash water or temporary immersion). S-type load cell are generally chosen based on their key parameters of rated load, limit or breaking load and minimum scale division. Where the load cell is to serve as a force transducer, the results are indicated in Newton. Based on the above data, designers of weighing equipment are able to determine its accuracy and permissible tare weight. We recommend choosing an S-type load cell that is verifiable, as most weighing systems need to be verified.