Crane Scales and Dynamometers

Choose a scale where your typical loads fall well within the usable accuracy range of the scale, not just under its maximum rated capacity — since a load cell's error is a percentage of its rated capacity, a scale that's greatly oversized for your typical load will give a less precise reading than one properly matched to your actual load range, even though both are technically 'rated' for the load.

A crane scale is specifically configured and typically marketed for in-line weighing of suspended loads in a lifting operation. A dynamometer is a more general force-measurement instrument used for tension and pull-force applications like rigging proof testing or tow force measurement — the two often share the same underlying load-cell technology but are packaged and calibrated for their respective use cases.

If a load exceeds the scale's rated capacity, without overload protection the load cell can be permanently damaged, and in some designs, a damaged component could contribute to a rigging failure. Overload protection — a mechanical stop and/or electronic cutoff — limits the actual stress transmitted through the scale beyond its rated point, protecting both the instrument and the safety of the lift.

For safety-critical lifting applications, yes — a valid calibration certificate and, depending on the jurisdiction and application, periodic proof-testing per the relevant lifting equipment standard are typically required to trust the scale's readings for load verification. Check the specific regulatory and site requirements that apply to your lifting operations.

A wireless remote display lets the operator or rigger read the load weight from a safe distance away from the suspended load, rather than needing to be close enough to read a local display on the scale itself — this improves both safety (staying clear of the load) and visibility during the lift, especially on larger or more complex lifting operations.