Brewery

Keg-Meter is the most accurate digital draft beer monitoring system designed for home use.
Ensure you never run out of beer during the party, game, or on Sundays.
The digital Keg-Meter measures the amount of beer poured and continuously displays the number of 12 oz. beers left in your pressurized keg (not for use with hand pumps).

The Keg-Meter requires installing a sensor in-line with your existing beer line, calibrate, and you are ready to go.
And being about 7% accurate over the entire keg means you always know how much beer is in your keg.
You wouldn't drive a car without a gas gauge, and beer is more important!