| A load cell is a transducer. It's a mechanical electrical | | | | should be calibrated properly to show actual force or |
| component used in various industries. Application field | | | | weight applied. |
| varies from personal health care to large scale / | | | | The load cell has found various applications:- |
| heavy scale manufacturing industries. It is also used in | | | | |
| automation and security systems. | | | | 1. Security system. |
| When ever the load is applied the sensing element | | | | 2. Weighing scales. |
| changes its shape depending upon the stress, tension | | | | 3. Personal scales. |
| or compression developed. There are various types | | | | 4. Defence Industry. |
| like capacitance or strain gauge based. | | | | 5. Laboratory weighing equipments. |
| In modern market strain gauge based load cells are | | | | 6. Pharma Industries. |
| widely used.The working depends upon Wheatstones' | | | | 7. Industrial Automation. |
| bridge circuit. This circuit when invented didn't use | | | | 8. Tank or Silo weighing. |
| strain gauge. When under load, force or pressure the | | | | 9. Pressure sensing of fluids. |
| resistance in strain gauges change and also the flow | | | | 10. Material testing. |
| of current. So we can conclude that load or force | | | | 11. Construction Industry to test the strength of |
| applied is converted into change in resistance and | | | | pillars and base of the building and many more |
| thus it is called as transducer. The change in | | | | endless applications. |
| resistance is directly proportional to the applied force | | | | Capacitance based cells are also available but are bit |
| or load or pressure. To make the physical force or | | | | complicated to manufacture. Strain gauges are easily |
| load human readable we need electronic circuit | | | | available from manufacturers and are also cheaper |
| system which is calibrated to show equivalent current | | | | than capacitance sensors, so nowadays strain gauge |
| change to load proportion. The electronic circuit | | | | based cells are widely used. |