USGS Type AA Low Velocity Current Meter

Current Meter, USGS Type AA-LV

The Type AA-LV is for extremely low velocities. It has no penta gear assembly in the contact chamber which reduces friction. The center shaft and contact chamber allow two electrical contacts per revolution of the bucket wheel. This feature makes counting revolutions easier in extremely low velocities. The meter uses the same standard USGS rating table as the Type AA meter and physically looks exactly the same.