When reading a ball-float-type flowmeter, at what point on the ball should the flow reading be taken?

In a ball-float-type flowmeter, the correct flow reading is taken at the top of the ball. This is because the float, typically designed to be buoyant, rises and falls with the flow of liquid. The position of the ball indicates the flow rate due to the fluid movement passing through the meter.

As flow increases, the ball lifts higher. The flowmeter calibration is designed so that the top of the ball corresponds to specific flow rates marked on the scale. Therefore, taking the reading from the top ensures accuracy and aligns with how the flowmeter is intended to function, reflecting the level of flow in the system effectively.

Reading from other positions such as the bottom, middle, or side would not accurately represent the flow and may lead to misinterpretations of the actual flow rate, as these points do not correlate with the flowmeter's calibration.