A Load Cell is a device that is used to measure weight or force in a number of different applications. The load cell itself is a transducer that is used to convert a force into an electrical signal. This signal is usually only a few millivolts and requires amplification before it can be used. Most load cells use strain gauge technology. This technology is very well established and has been proven for more than 40 years. 

Load cells are frequently used as part of a weighing system because they offer non-intrusive, highly accurate load measurement data, with properly installed and calibrated load cells routinely achieve accuracies of around 0.03 to 1% (depending on load cell type). These systems are of fundamental importance to many industrial sectors including aerospace, offshore, marine, heavy lifting and automotive. Product liability and safety issues demand that force measurements are demonstrably accurate, which is usually achieved by calibration to National Standards. This traceability to a National Standard is also often a requirement for compliance to ISO9000, resulting in company procedures that specify calibration schedules and the maintenance of appropriate records as part of their Quality Management System. 

As all load cells are subject to deterioration due to use, mistreatment, drift or ageing, calibration at regular intervals should to be carried out to establish how the load cell is currently performing, irrespective of whether the company has a Quality Management System in place. Load cells can also become less reliable due to electrical influence, mechanical effects, instrumentation faults and loose cables etc. Failure to inspect or clean load cells is another significant factor that can lead to operational issues, as particulate matter can build up around load cells even in clean environments. Unless calibrations are routinely carried out, load measurement readings can become less and less accurate, with the user potentially being unaware that they are using flawed data. 

Ruima Electric Manufacturing (Fujian) CO,.LTD specialized in single-ended load cells, double-ended load cells, S-type load cells, cup and ball type load cells. You can click on our web: http://en.cnrme.com/ to know more about load cells.