The Loot Collector is an upgrade machine used in conjunction with an Industrial Tesla Coil.
This machine has a 9-slot inventory, plus an extra filter slot. When the tesla coil shoots a dropped item matching the item in the filter slot, the item will be teleported to the loot collector's inventory. You must set a filter, and only one type of item can be collected. You can use multiple loot collectors together for different types of items. Items cannot be duplicated by setting two Loot Collector upgrades to the same item.