A refrigerant system, comprising: a liquid-gas separator device including: a refrigeration section configured to couple to a refrigeration loop, the refrigeration section comprising: a refrigerant inlet configured to receive refrigerant from the refrigeration loop; a refrigerant outlet configured to release vapor refrigerant to the refrigeration loop; and a cavity coupled to the refrigerant inlet and the refrigerant outlet, the cavity configured to separate liquid refrigerant from vapor refrigerant; and an electronics board thermally coupled to the refrigeration section, such that in use, heat from the electronics board is transferred to the refrigerant; characterized in that the refrigerant inlet and the refrigerant outlet are positioned on a first side of the liquid-gas separator device, and wherein the cavity comprises: an inlet sub-cavity coupled to the refrigerant inlet; an outlet sub-cavity coupled to the refrigerant outlet, the outlet sub-cavity distinct from the inlet sub-cavity; and a cap fluidly coupling the inlet sub-cavity to the outlet sub-cavity, such that the refrigerant flows through the inlet sub-cavity into the cap and from the cap into the outlet sub-cavity, the cap positioned on a second side of the liquid-gas separator device, opposite the first side. a refrigeration section configured to couple to a refrigeration loop, the refrigeration section comprising: a refrigerant inlet configured to receive refrigerant from the refrigeration loop; a refrigerant outlet configured to release vapor refrigerant to the refrigeration loop; and a cavity coupled to the refrigerant inlet and the refrigerant outlet, the cavity configured to separate liquid refrigerant from vapor refrigerant; and an electronics board thermally coupled to the refrigeration section, such that in use, heat from the electronics board is transferred to the refrigerant; a refrigerant inlet configured to receive refrigerant from the refrigeration loop; a refrigerant outlet configured to release vapor refrigerant to the refrigeration loop; and a cavity coupled to the refrigerant inlet and the refrigerant outlet, the cavity configured to separate liquid refrigerant from vapor refrigerant; and an electronics board thermally coupled to the refrigeration section, such that in use, heat from the electronics board is transferred to the refrigerant; characterized in that the refrigerant inlet and the refrigerant outlet are positioned on a first side of the liquid-gas separator device, and wherein the cavity comprises: an inlet sub-cavity coupled to the refrigerant inlet; an outlet sub-cavity coupled to the refrigerant outlet, the outlet sub-cavity distinct from the inlet sub-cavity; and a cap fluidly coupling the inlet sub-cavity to the outlet sub-cavity, such that the refrigerant flows through the inlet sub-cavity into the cap and from the cap into the outlet sub-cavity, the cap positioned on a second side of the liquid-gas separator device, opposite the first side. an inlet sub-cavity coupled to the refrigerant inlet; an outlet sub-cavity coupled to the refrigerant outlet, the outlet sub-cavity distinct from the inlet sub-cavity; and a cap fluidly coupling the inlet sub-cavity to the outlet sub-cavity, such that the refrigerant flows through the inlet sub-cavity into the cap and from the cap into the outlet sub-cavity, the cap positioned on a second side of the liquid-gas separator device, opposite the first side.