The OD Scanner (Ore Density Scanner) is a tool that allows players to determine an approximate amount of valuable resources within a 5x5block area. The OD Scanner can hold up to 10,000 EU, and can be used 211 times before running out of energy, meaning that one use will use up roughly 47 EU.
To use the OD Scanner right click while holding it, and it will scan the blocks in a 5x5 around the player, going down to bedrock. Every valuable resource found adds 1 to the density of the area. After the scan, the total Ore Density in an area is then calculated according to the following formula:
In this case, it is equal to 25x scan height. The result is output on player's screen.