Re:windshield pumps? common (Score 1)

I used gravity in my "trough". The way it measured was simple in principle and quite accurate but my system is quite large. I have tubes of different diameters that go straight up a wall. I have 4 values that open depending on the amount of the ingrediant that you want. The ingrediant is on a self above the bar and higher then the top of the tube. The liquid flows out of its container into the "measuring" tubes until it is level with the container. I open another set of values at the bottom of the tubes that dump the liquid into a glass. The error in my system is the height of the liquid in the container. I used containers that are long and wide and not very high. The hose I used is very small so my error is also very small. I am accurate to about 1/16 of an ounce. My gravity system may not be clean since I use values to determine which ingrediant is selected, the amount to pour and to dump the measuring tubes.