i think some thing like in space engineers
Ore Detector
The Ore Detector is a block in Space Engineers. When attached to a ship and supplied with power, it will display up to 5 ore locations on the player's HUD when they are within range
If installed on a Small Ship, the range is 50 meters.
If installed on a Large Ship or Station, the range is 150 meters.
The range of the Ore Detector does not stack, just overlaps.
cradit to http://spaceengineers.wikia.com/wiki/Ore_Detector