These are the most common type of gas meter, seen in almost all residential and small commercial installations. Within the meter there are two or more chambers formed by movable diaphragms. With the gas flow directed by internal valves, the chambers alternately fill and expel gas, producing a near continuous flow through the meter. As the diaphragms expand and contract, levers connected to cranks convert the linear motion of the diaphragms into rotary motion of a crank shaft which serves as the primary flow element. This shaft can drive an odometer-like counter mechanism or it can produce electrical pulses for a flow computer.
Diaphragm gas meters are positive displacement meters.
Famous quotes containing the words meters and/or bellows:
“In our Mechanics Fair, there must be not only bridges, ploughs, carpenters planes, and baking troughs, but also some few finer instruments,rain-gauges, thermometers, and telescopes; and in society, besides farmers, sailors, and weavers, there must be a few persons of purer fire kept specially as gauges and meters of character; persons of a fine, detecting instinct, who note the smallest accumulations of wit and feeling in the bystander.”
—Ralph Waldo Emerson (18031882)
“The body is but a pair of pincers set over a bellows and a stewpan and the whole fixed upon stilts.”
—Samuel Butler (18351902)