General information
Operating principle of the variable area flowmeter
The measuring instrument works according to the float measuring principle
The measuring unit consists of a tapered graduated precision glass measuring cylinder in which a
ball float can move freely up and down. The medium flows through the vertically-aligned measuring
cylinder from the bottom upwards.
The float positions itself so that the buoyancy force A acting on it, the form resistance W and its
weight G are in balance::
G = A + W
The flow rate can be read as the height of the float on a scale on the tapered measuring cylinder.
The value is read off at the middle of the float (largest diameter).
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