Liquid dispensing module and methods for dispensing a heated liquid onto a substrate. The method provides a base-metal layer having at least one opening. In this state, the resin 13 is heated to generate gas bubbles 30 from the gas bubble generating agent contained in the resin 13. A transceiver is coupled to one of the following sensors: a magnetostatic sensor energized by the power supply and responsive to the structural features on the ring gear to generate an output signal when the ring gear rotates, and the electromagnetic sensor.