Limit Switch

Limit Switch or An anti-two-blocking system is a technologically advanced electrical device with a built-in sensor that helps the crane operator prevent two-blocking incidents.

Two of the most popular variations of this safety device are wireless ATB systems and hardwired ATB systems.

The wireless device is easy-to-install and use and is compatible with lattice and telescopic boom cranes. The audio-visual alarms on the display alert the crane operator when the hook has reached the maximum safe height. Moreover, the hardwire ATB systems work best with fixed boom cranes and help the operator ensure that the hook doesn’t come in contact with the boom tip.