Types of Pipe Thread Gas Meters

Coriolis Meter

• Coriolis flow meters use the latest technology to measure gas output. They are made by a flow pipe with threaded inlets on one side and, on the other side, an outlet. A sensor is also connected to the unit. The pipes are vibrated by the flow and emit a resonant frequency which is measured. They are used for both liquids and gasses.

Turbine Meters

• Turbine gas meters tell gas volume by detecting the speed of the gas moving through pipes. The volume of gas is determined by the flow through threaded inlets rather than a vibration like a coriolis meter. The quality of flow can affect these meters and they are not as accurate. A turbine gas meter contains an internal turbine that calculates the flow of gas and transmits the signal to an electronic counter.

Orifice Meters

• Orifice gas meters are comprised of a straight length of pipe with a hole, or orifice that detects a change in flow. They measure the rate of gas flow by pressure differences across the hole and thread. Gas pressure, density and temperature are also measured for an accurate reading. Orifice meters are less accurate though than other meters because they do not measure large flow rates. The advantage of using one is they are easy to service since they have no moving parts.

Ultrasonic Flow Meters

• Ultrasonic flow meters are the more complex than others. They use signal processing to calculate complex variations of flow. They measure the speed of gas through their pipes and threads by measuring sound. The speed of sound through the gas determines the flow rate. A speed-of-sound calculation has been developed to tell how much gas with a particular pressure and temperature carries through pipes.