Abstract: Disclosed are systems, apparatuses and methods for determining the amount of liquid contained within a vessel. In one aspect, a liquid dispensing apparatus is provided comprising a pour spout mountable to an opening formed by a liquid containing vessel. A range sensor assembly is housed within the pour spout and comprises a trigger pulse source capable of receiving an actuation signal to thereby provide a trigger pulse and an echo pulse detector capable of providing an echo pulse detection signal. A microcontroller is provided in communication with the range sensor assembly. The microcontroller is configured to send an actuation signal to the trigger pulse source and to receive an echo pulse detection signal from the echo pulse detector, and, in a further aspect, can be configured to determine an elapsed time occurring between an actuation of the trigger pulse source and a subsequent detection of an echo pulse.