Utility Meters Warehouse Ltd offer a range of highly accurate flow meters covering all capacities, approved for custody transfer measurement, equipped with electronic pulse outputs and mechanical counters.
A Gas Meter is a specialized flow meter, used to measure the volume of fuel gases such as natural gas. Gas Meters are used at residential, commercial, and industrial buildings that consume gas supplied by a gas utility. Gases are more difficult to measure than liquids because measured volumes are highly affected by temperature and pressure. Gas Meters measure a defined volume, regardless of the pressurized quantity or quality of the gas flowing through the meter. Temperature, pressure, and heating value compensation must be made to measure actual amount and value of gas moving through a meter.
Several different designs of gas meters are in common use, depending on the volumetric flow rate of gas to be measured, the range of flows anticipated, the type of gas being measured, and other factors.
Elster – Diaphragm Gas Meters:
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 nearly 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.
Romet – Rotary Meters:
Rotary Meters are highly machined precision instruments capable of handling higher volumes and pressures than diaphragm meters. Within the meter, two figure “8” shaped lobes, the rotors (also known as impellers or pistons), spin in precise alignment. With each turn, they move a specific quantity of gas through the meter. The rotational movement of the crank shaft serves as a primary flow element and may produce electrical pulses for a flow computer or may drive an odometer-like counter.
Flow Meter Group – Turbine Meters:
Turbine Gas Meters infer gas volume by determining the speed of the gas moving through the meter. Because the volume of gas is inferred by the flow, it is important that flow conditions are good. A small internal turbine measures the speed of the gas, which is transmitted mechanically to a mechanical or electronic counter. These meters do not impede the flow of gas but are limited at measuring lower flow rates.
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