A melt system capable of heating hot melt pellets into a liquid, the melt system comprising: a melter comprising: a thermally conductive body forming an interior with a surface area; a chamber at an upper end of the body for receiving the pellets; a collector within the body and located below the chamber for receiving the liquid from the melted pellets; and a plurality of channels that extend between the chamber and the collector, wherein a plurality of walls of the plurality of channels form heat exchange surfaces; a first heater (50, 82) for transferring heat to the body; a feed hose configured to provide the pellets to the chamber; a feed cap connected to a top of the melter, the feed cap having a cap top through which the feed hose extends, a cap side, and a sensor connection positioned on the cap top, the cap side including a window configured to vent air from within the melter; a sensor tower connected to the sensor connection; a controller that causes a feed assembly to replenish the pellets in the melter; and a level sensor connected to the controller, the level sensor being configured to determine a melt level of the liquid from the melted pellets and send melt level data to the controller, wherein the level sensor is connected to the cap top sensor tower such that the level sensor is aimed toward the top of the melter so as to determine an indication of the distance between the level sensor and the melt level. a melter comprising: a thermally conductive body forming an interior with a surface area; a chamber at an upper end of the body for receiving the pellets; a collector within the body and located below the chamber for receiving the liquid from the melted pellets; and a plurality of channels that extend between the chamber and the collector, wherein a plurality of walls of the plurality of channels form heat exchange surfaces; a thermally conductive body forming an interior with a surface area; a chamber at an upper end of the body for receiving the pellets; a collector within the body and located below the chamber for receiving the liquid from the melted pellets; and a plurality of channels that extend between the chamber and the collector, wherein a plurality of walls of the plurality of channels form heat exchange surfaces; a first heater (50, 82) for transferring heat to the body; a feed hose configured to provide the pellets to the chamber; a feed cap connected to a top of the melter, the feed cap having a cap top through which the feed hose extends, a cap side, and a sensor connection positioned on the cap top, the cap side including a window configured to vent air from within the melter; cap top through which the feed hose extends, a cap side, and a sensor connection positioned on the cap top, the cap side including a window configured to vent air from within the melter; a sensor tower connected to the sensor connection; a controller that causes a feed assembly to replenish the pellets in the melter; and a level sensor connected to the controller, the level sensor being configured to determine a melt level of the liquid from the melted pellets and send melt level data to the controller, wherein the level sensor is connected to the cap top sensor tower such that the level sensor is aimed toward the top of the melter so as to determine an indication of the distance between the level sensor and the melt level.