Which device can be used to estimate the weight of a load being lifted?

Which device can be used to estimate the weight of a load being lifted?

• A. Load cell
• B. Tachometer
• C. Altimeter
• D. Barometer

Answer: (A)

Estimating the weight of a load being lifted relies on sensing the lifting force directly. A load cell uses a strain gauge arrangement that deforms under the load’s force and converts that deformation into an electrical signal that is calibrated to weight. This allows the crane’s system to display and monitor the actual load, enabling safe operation and overload protection. A tachometer measures rotational speed, which has no direct link to weight. An altimeter tracks altitude, not mass. A barometer gauges atmospheric pressure, which also isn’t related to the load’s weight. So, the device that best provides the weight estimate is the load cell.

Estimating the weight of a load being lifted relies on sensing the lifting force directly. A load cell uses a strain gauge arrangement that deforms under the load’s force and converts that deformation into an electrical signal that is calibrated to weight. This allows the crane’s system to display and monitor the actual load, enabling safe operation and overload protection. A tachometer measures rotational speed, which has no direct link to weight. An altimeter tracks altitude, not mass. A barometer gauges atmospheric pressure, which also isn’t related to the load’s weight. So, the device that best provides the weight estimate is the load cell.