Core Exiles Community Forums

If I use a profession booster to survey a resource needing too high a skill or equip a gun, do i need to spend
just 1 profession boost for the moment I place the extractor or equip the gun
or 1 for every hour the device is in use?
Thanks!

Are we talking about the "Profession XP Boost" things? If so, they do not boost your skills. They boos the experience points you gain for one hour. You want to use them just before you do some long range hauls or crafting large items.