Stainless steel, laser welded
Stainless Steel, laser-welded
WORKING PRINCIPLE OF SINGLE-POINT LOAD CELL
Single-point load cells are the preferred option for platform scales. Their properties are determined by the built-in metal spring element that is deformed under load. This deformation or strain is picked up by strain gauges installed on the spring element and converted into an electrical signal. Like most other types of load cells, single-point load cells can be calibrated for grams, kilograms or tons.
Single-point load cells are commonly used in weighting equipment for small to medium loads up to 5 tons. They are found in platform scales, conveyor scales, hopper scales or dosing scales. Single-point load cells are also used in lift overweight alarm systems or to measure compressive forces.
Single-point load cells are designed to withstand the harsh conditions of industrial production plants and are normally available from protection class IP65. In contrast to other load cells, they are optimised to compensate for asymmetric loads and calibrated accordingly, which means that they can accurately measure a load, even if it is placed on one corner of the platform. The data sheet contains all parameters to be taken into account when manufacturing a weighing device with a single-point load cell. These include the rated load, the minimum scale division for the calculation of the maximum tare weight, and the limit load. Using single-point load cells, it is relatively easy to construct platform scales. All that is essentially required is a load cell placed between two metal plates. As most weighing equipment is subject to verification, single-point load cells are generally verifiable.