Which instrument is most directly used to estimate weight of a lifted load?

• A. Load cell
• B. Light meter
• C. Barometer
• D. Microphone

Answer: (A)

To estimate the weight of a lifted load, you need a sensor that directly measures the force the load exerts. A load cell does this by converting the applied force into an electrical signal, with the output proportional to the weight. In cranes, load cells are often integrated into hook blocks or load links so the operator can see the weight in real time and stay within safe lifting limits. A light meter measures light levels, a barometer gauges atmospheric pressure, and a microphone captures sound—none of these track the actual force from a lifted load. Because it directly translates load force into a readable signal, the load cell provides the most accurate, immediate estimate of the weight.