piston meter

piston meter

[′pis·tən ¦mēd·ər]
(engineering)
A variable-area, constant-head fluid-flow meter in which the position of the piston, moved by the buoyant force of the liquid, indicates the flow rate. Also known as piston-type area meter.
References in periodicals archive ?
Low flow rates pass through the disc or piston meter section only, until the maximum capacity is reached, at which time the valve opens and the higher flow rates are measured through the turbine section.
Oscillating Piston Meters. These meters contain a cylindrical measuring piston closely fitted into a cylindrical measuring chamber.
A one-piece, stainless steel piston meters gas; no seals, rings, springs, or valves.
Oscillating piston meters are manufactured by Kent Meters, Inc.; Sensus Technologies, Inc.
Oscillating piston meters are manufactured by Carlon Meter Co.; Kent Meters, Inc.; Sensus Technologies, Inc.