Wet meter

Related to Wet meter: Moisture Meter
a gas meter in which the revolution of a chambered drum in water measures the gas passing through it.

See also: Meter

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A Ritter wet meter was used for the measurements of biogas volumes.
1840s-1850s Two samples of early meters produced by Samuel Down include a three-light wet meter and a three-diaphragm "exhibition meter" (right).
1855 McDonald wet meter was produced in Albany, N.Y.
Of course, wet meters are a problem because anything that is touching brine is subject to corrosion and because of the scaling nature of the salt that collects on surface, plugs orifices, and degrades other signals.