load cell working principle

The core principle stays the same—force changes the resistance of strain gauges. What changes is the mechanical design. Compression load cells use a column, bending beam types use a beam, and shear web designs use the shear stress in a structural element. Kingmach selects the design based on the required capacity and mounting constraints, but the underlying strain gauge bridge remains consistent across all models.

Most of our load cells output a millivolt signal, typically 1–3 mV/V. You’ll need a readout instrument or data logger that accepts bridge inputs. We often pair them with our digital readout units that handle excitation, amplification, and display. Some projects integrate them directly into PLC systems via a transmitter.

Check the temperature effect on zero and span in the datasheet. Kingmach cells typically compensate across -20°C to 60°C with drift under 0.02% of full scale per degree. For extreme conditions, we can extend that range with custom calibration. In practice, this means minimal data correction is needed overnight or across seasons.

The biggest killers are eccentric loading and bent center holes. Always use proper bearing plates to distribute force evenly, and ensure the hydraulic jack sits flat during tensioning. For multi-strand anchors, our center-hole load cell design eliminates most alignment issues. Also, let the assembly settle for a few minutes before zeroing your readout.