Diaphragm Gas Meters in Saudi Arabia & GCC

A diaphragm gas meter, also called a bellows or membrane meter, measures gas by filling and emptying chambers of known volume.

It is used for residential and commercial connections on low pressure networks, with natural gas, LPG and other non-corrosive gases. This page covers sizes from G1.6 (2.5 m³/h) to G25 (40 m³/h), all with a maximum operating pressure of 500 mbar, for gas networks and industry in Saudi Arabia and the GCC: the UAE, Qatar, Kuwait, Bahrain and Oman.

Diaphragm Gas Meters: products

MM diaphragm gas meter for commercial users, zinc-coated steel case, by Pietro Fiorentini

H2 Ready

Diaphragm Meter

MM

Mechanical diaphragm gas meter with zinc-coated steel plate external case for low-pressure operations.

Capacity: G10 - G25
Communication: Mechanical
Application: Commercial / Light Industrial

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RS/2001 LA residential diaphragm gas meter, pre-galvanised steel case, by Pietro Fiorentini

H2 Ready

Diaphragm Meter

RS/2001 LA

High accuracy mechanical gas meter compatible with hydrogen blending for residential distribution.

Capacity: G1.6 - G4
Communication: Mechanical
Application: Residential / Commercial

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RS 2.0 / RST 2.0 diaphragm gas meter, RST with temperature compensation, by Pietro Fiorentini

H2 Ready

Diaphragm Meter

RS 2.0 / RST 2.0

New generation residential gas meter with optional temperature compensation and hydrogen compatibility.

Capacity: G4 - G6
Communication: Pulse / Module Ready
Application: Residential / Commercial

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RS/2,4 residential diaphragm gas meter, 1¼ inch ISO 228 connection, by Pietro Fiorentini

H2 Ready

Diaphragm Meter

RS/2,4

Mechanical diaphragm gas meter for residential low-pressure gas distribution applications.

Capacity: G4 - G6
Communication: Mechanical
Application: Residential / Commercial

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How to choose a diaphragm gas meter

Size from peak flow
The G number sets the maximum flow (G4 6 m³/h, G6 10 m³/h, G16 25 m³/h, G25 40 m³/h) and the minimum flow rises with size: pick the smallest size covering the appliances' peak flow.
Flats and villas: RS/2001 LA
For a flat or villa, the RS/2001 LA covers G1.6, G2.5 and G4 with accuracy class 1.5 and connections from 3/4 inch to 1¼ inch ISO 228, or a 2 inch monopipe.
G4 and G6 meters
The RS/2,4 has a 2.4 litre cyclic volume and a 1¼ inch connection; the RS 2.0 / RST 2.0 adds temperature compensated billing (RST 2.0) and a plug-in for a pulse transmitter or communication module.
Commercial and industry: MM
For commercial users and small or medium industry, the MM covers G10, G16 and G25 with 1¼ inch, 2 inch and 2½ inch connections, optionally with two thermowells and a pressure tapping for checks.
Remote reading: HM, HM-iCON
If the site needs remote reading, look at the HM or HM-iCON smart gas meters, which put an electronic totalizer on the same diaphragm measuring principle.
Standards and hydrogen
All four models are designed to EN 1359 and certified under MID; the MM, RS/2001 LA and RS/2,4 are also designed to OIML R137 and rated for blends with up to 20% hydrogen.
What to send us
For housing projects in Jeddah, Riyadh or Kuwait City, tell us the gas (natural gas or LPG), the connection size and whether you need temperature compensation.

Frequently asked questions

How does a diaphragm gas meter work?

Inside the meter, flexible synthetic diaphragms separate measuring chambers of a known volume, called the cyclic volume. Gas fills and empties the chambers in turn, and the index counts each cycle as volume. For example, the RS/2,4 has a cyclic volume of 2.4 litres and the RS 2.0 / RST 2.0 has 2.0 litres. The principle is mechanical and needs no external power.

Can a diaphragm gas meter be used for LPG?

Yes. The MM, RS/2001 LA and RS/2,4 are suitable for natural gas, manufactured gas, LPG and other non-corrosive, pre-filtered gases, and the RS 2.0 / RST 2.0 is listed for natural gas, propane and butane. All are low pressure meters with a maximum operating pressure of 500 mbar, so they are installed downstream of a pressure regulator.

What does G4, G6 or G25 mean on a gas meter?

The G number is the meter size class and fixes the maximum flow rate. On the meters on this page, G1.6 is 2.5 m³/h, G2.5 is 4 m³/h, G4 is 6 m³/h, G6 is 10 m³/h, G10 is 16 m³/h, G16 is 25 m³/h and G25 is 40 m³/h. The residential models run from G1.6 to G6 and the commercial MM from G10 to G25.

Which meter on this page offers temperature compensation?

The RST 2.0 measures the temperature-compensated gas volume, while the RS 2.0 measures at ambient conditions. Both are G4 or G6 meters with a 2.0 litre cyclic volume, MID approval (Module B and D) and a plug-in for a pulse transmitter or communication module. For temperature and pressure compensation with remote reading on commercial sites, the HM smart gas meter is the alternative.

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