Heat Gauge
Heat Gauge is Machinist's Job Gauge.
Heat Gauge in PvE
Upon learning the action Hypercharge, the Heat Gauge will be displayed.
Using certain weaponskills will generate heat. When you have generated enough, Hypercharge can be activated, overheating your firearm. This allows the execution of certain weaponskills such as Heat Blast (acquired at level 35) and Auto Crossbow (acquired at level 52).
Upon learning the action Rook Autoturret, the Battery Gauge will be displayed.
The Battery Gauge accumulates when certain actions are performed and allows the placement of a Rook Autoturret, which will attack your target. It also allows the deployment of an Automaton Queen (acquired at level 80) to fight alongside you.
Ammunition & Heat Gauge in PvP
The Ammunition Gauge indicates the number of rounds of special ammunition currently loaded in a machinist's firearm. Special ammunition can be loaded to any firearm by executing the action Quick Reload.
The Heat Gauge─indicating a firearm's temperature─is displayed upon execution of the action Gauss Barrel. When the gauge reaches 100, the firearm becomes overheated. While overheated, a firearm will deal additional damage, but will soon become too hot to use. At this time, the Gauss Barrel is automatically removed and cannot be reattached until it cools.
Maintaining a high firearm temperature will render the actions Split Shot, Slug Shot, and Clean Shot heated, increasing their damage.