The diaphragm meter is a positive displacement natural gas flow meter used by utility companies for billing of residential and light commercial applications.

Natural Gas Flow Measurement

In our Sage-In the Flow blog, we routinely discuss applications for thermal mass flow meters because that is what we manufacture at Sage. Our meters serve a wide range of applications; however there are many other meters that excel in other applications. For this reason, I will present a simple series on different natural gas flow meter types beginning with the diaphragm gas meter.

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 Natural Gas Flow Meter Types | Diaphragm Meters Reviewed
The Diaphragm meter is a positive displacement natural gas flow meter used in residential and light commercial billing applications for the utility company.

Diaphragm Gas Meter

The diaphragm gas meter is one of the most common and oldest natural gas meters. The development of this device in the 19th century was pivotal in the natural gas industry’s success as it created a reasonably priced way to charge the end user for their energy use. Diaphragm meters are found mostly on residential properties and light commercial buildings. This type of meter measures the quantity of natural gas the user consumes so that the gas distributor can bill for it.

Positive Displacement Meter

The diaphragm gas meter is a positive displacement meter, which is also known as a PD flow meter or volumetric flow meter.In this case, the gas flows into a meter inlet or chamber, which has an oscillating diaphragm and contains a known capacity of the gas. The section fills and empties the gas and with each cycle the volumetric flow rate is determined.  

Advantages

Diaphragm meters are relatively inexpensive offering a low cost way for billing measurements for utility companies. They have a long life expectancy. For example, the old Sprague meter shown is around 30 years old and still in service. Rotary meters or newer smaller diagram meters commonly replace these older, well served meters, and many times include AMR (automatic meter reading) systems which allow for remote meter reading.

Limitations

The main disadvantages of diaphragm gas meters stem from the meter having moving parts. For this reason, they require periodic maintenance, and the gas cleanliness should be considered when using them. The gas meters are usually used in smaller pipes and at relatively low flow rates. While this meter type is accurate for volumetric flow, pressure and temperature compensation are needed to achieve mass flow.

Manufacturers

Some popular diaphragm gas meter manufacturers include Elster American Meter, Dresser, Itron and Sensus.

Perhaps these other meter styles may interest you: rotary meters, gas turbine meters, ultrasonic meters, Coriolis flowmeter, orifice plates and of course, the thermal mass flow meter.

One thought on “Natural Gas Flow Meter Types | Diaphragm Meters

  1. Avatar
    Tamim Hossain says:

    Hi,
    This is Tamim Hossain from Bangladesh looking a LPG gas meter. my basic requirements are as follows,
    g 1.6
    inlet – 3/4 dia
    outlet – 3/4 dia
    please send me details specification as per my basic requirements. along with price FOB ctg, minimum order qty.
    Please also mention your mode of payment.

    Looking forward to hear from you.

    With best Complements,
    Tamim Hossain

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