Which device is designed to measure load force during crane lifting?

Which device is designed to measure load force during crane lifting?

• A. Load cell
• B. Motion sensor
• C. Camera
• D. Vibration sensor

Answer: (A)

Measuring load force during crane lifting is done with a device that directly converts the tension in the hoist line into an electrical signal. That device is a load cell. Inside, strain gauges detect tiny deformations in a metal element when the rope is under load; these changes in resistance are converted into a voltage that is proportional to the actual force. This allows real-time monitoring of how much weight is being lifted, helps prevent overload, and supports safe crane operation. The other options—motion sensors that track movement, cameras that provide visuals, and vibration sensors that detect vibrations—do not directly measure the load in the rope, so they’re not used to quantify lift force.

Measuring load force during crane lifting is done with a device that directly converts the tension in the hoist line into an electrical signal. That device is a load cell. Inside, strain gauges detect tiny deformations in a metal element when the rope is under load; these changes in resistance are converted into a voltage that is proportional to the actual force. This allows real-time monitoring of how much weight is being lifted, helps prevent overload, and supports safe crane operation. The other options—motion sensors that track movement, cameras that provide visuals, and vibration sensors that detect vibrations—do not directly measure the load in the rope, so they’re not used to quantify lift force.