1. Height digital display device. The height digital display device actually belongs to the same device as the second limit. The signal output by the encoder can be converted into the actual lifting height of the electric hoist after being processed by a specialized instrument, accurately knowing the actual lifting height of the electric hoist, which is particularly important for high lift electric hoists.

　　2. Electric trolley anchoring device. The anchoring device of electric cars is more suitable for electric hoists with single track or double track suspension. When the electric hoist is not working, some special places hope that the electric hoist can be anchored at a designated location and cut off the main power supply of the electric hoist at this time. This is also an effective protective measure, especially suitable for use in places with wind and vibration loads.

　　3. Use both remote control and manual control. The combination of remote control and manual control is the first time we have used it on electric hoists. For electric hoists with larger lifting heights and longer running distances, it is particularly important to use remote control, which brings convenience to the operation. But manual control is essential, mainly to increase the reliability of electric hoist operation and prevent unexpected events from happening. In terms of remote control and manual control, a control circuit can be designed where remote control follows manual control or manual control follows remote control.