Zenner Atmos Diaphragm Gas Meter G1.6A and G2.5A

Solid build quality, high accuracy, safety and a series of advanced technical details make the Atmos® diaphragm gas meter a high-grade measuring instrument.


The Diaphragm gas meter is available in sizes G1.6 and G2.5. The meter is characterized by precise measurements, a constant measuring stability, a long life and high reliability. Thanks to the use of high-grade materials the diaphragm gas meter is resistant to corrosion.

The gas meter is suitable for various gas media. The integrated calibration system coordinates the movement of the valves in relation to the optimum gas flow. The excellent linearity of the error curve is guaranteed even at low flow rates. Due to the optimum rotating characteristics of the valves the Qmin value remains stable and the gas meter is resistant to contamination.




ZENNER gas meters impress by the solid processing of high-quality materials combined with a large number of technical details. In the manufacturing process we purely use materials of the highest quality that meet the requirements for product lifetime, security and technical precision.

For example, the housing of our diaphragm gas meters are made of high quality steel or aluminum. The raw material of the essential parts are imported from Europe.

In addition we purely use tested component connections to guarantee that the meters are solid, safe and leakproof. The corrosion resistance is ensured by the use of galvanized steel and die-casting aluminum. In addition to meters are mainly used in residential, commercial and industrial settings.


  • Integrated system to adjust the error curve
  • Die-cast aluminum housing for maximum corrosion resistance
  • Starting flow [lt] 1 dm³/h
  • Working temperature range: -10 °C to +40°C
  • Operating pressure: 0.5 bar
  • Long-term stability due to usage of high-quality diaphragms
  • Optional: reverse flow preventer


The gas meter is suitable for use with various gas media:

  • Natural gas
  • Town gas
  • Biogas
  • Liquid gas
  • Methane gas



    G1.6A G2.5A
Nominal Flow Rate Qn m³/h 1.6 2.5
Maximum Flow Rate Qmax m³/h 2.5 4
Minimum Flow Rate Qmin m³/h 0.016 0.025
Maximum operating pressure   bar 0.5 0.5
Maximum permissible errors 0.1 Qmax ≤ Q ≤ Qmax

Qmin ≤ Q < 0.1 Qmax

  ± 1.5%

± 3%

± 1.5%

± 3%

Max. pressure loss   mbar ≤ 2 ≤ 2
Display range max.   m³/h 99999.9998 99999.9998
Display range min.   m³/h 0.0002 0.0002
Accuracy class class   1.5 1.5
Cyclic volume   dm³ 1.2 1.2
Pulse value   m3/pulse 0.01 0.01
Weight   kg 1.8 1.8

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