transducer load cells

Standard versions are rated for outdoor use with IP67 sealing, meaning they resist dust and temporary immersion. For permanent submersion, such as in a wet borehole, IP68-rated models with double O-ring seals and marine-grade connectors are recommended. They are also compensated for temperatures from -20°C to 70°C, which covers most geotechnical environments unless you are monitoring permafrost or a furnace.

Column cells work well when you have a flat, parallel loading surface and can place the cell directly in the load path, like under a hydraulic jack. Annular (donut-style) cells are used when a bar or tendon has to pass through the center—common in rock bolt and anchor monitoring. The choice often comes down to geometry; the performance specs are similar for the same capacity.

Yes, that is one of Kingmach's strengths. If you need, say, a 350 kN cell with a certain outer diameter, the engineering team can modify an existing design. There is usually an NRE (non-recurring engineering) charge for significant changes, but it tends to be economical for even a small batch of units.

Every load cell ships with a calibration certificate showing applied load versus output across the full range, usually in both directions if the cell is bidirectional. The data is traceable to national standards via the lab's reference load frame. If you need an accredited certificate from an external body, that can also be arranged at extra cost.

For field monitoring, annual recalibration is standard practice, though many users extend that to every two years if the cells are kept clean and dry. Kingmach can recalibrate them in-house or recommend local labs. The most common drift is in the zero reading after heavy overloading, so always check the baseline before a new project phase.