Spice Harvesters are large, mechanical vehicles that players use to harvest spice melange from the surface of Arrakis. It is currently unknown how many spice harvesters a particular faction or house can have.
Whilst Spice Harvesters are an integral part of a players development on Arrakis, they are prone to being destroyed by Sandworms and as such, must be closely protected and recalled when a Sandworm is near; Harvesters can be set to auto-recall when Sandworm activity is detected, but this will come at a cost of 5% of Spice collection and players will need to re-deploy them when it is safe to do so.