Using Ethernet hub/repeaters you can go up to 500 meters for 10Mbit/s Ethernet with up to 4 repeaters between any two nodes in your network.
However, by the time you will reach the far end, considering all labor and additional equipment as well as power lines for the hubs/repeaters involved, fiber may become economically more reasonable despite it sounds expensive at first.
Fiber also is less susceptible to electromagnetic interference, which is an issue in a production environment.
With 2 km distance limit for a simple fiber solution you have plenty of room to build your network.
Dmitri Abaimov, RCDD