Zenner Atmos HP Diaphragm Gas Meter HPG1.6A, HPG2.5A, HP G4A

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 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. The high measuring range enables precise metering for flow rates from 0.016 m³/h to 6 m³/h. [nbsp]

The Atmos® diaphragm gas meter meets the requirements of the EN1359:1998/A1:2006 and OIML R137-1 (2012) standards.




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.


  • Approved in accordance with MID by NMi
  • Integrated system to adjust the error curve
  • Die-cast aluninum housing for maximum corrosion resistance
  • Fire resistant (HTB) up to 0.1 bar according to EN1359
  • Starting flow [lt] 1 dm³/h
  • Working temperature range: -25 °C to +55°C
  • Operating pressure: 1.5 bar
  • Long-term stability due to usage of high-quality diaphragms
  • Retrofittable with pulser
  • Optional: reverse flow preventer


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

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



  HP G1.6AHP G2.5AHP G4A
Nominal Flow RateQnm³/h1.62.54
Maximum Flow RateQmaxm³/h2.546
Minimum Flow RateQminm³/h0.0160.0250.04
Maximum operating pressure bar1.51.51.5
Maximum permissible errors0.1 Qmax ≤ Q ≤ Qmax


Qmin ≤ Q < 0.1 Qmax

 ± 1.5%

± 3%

± 1.5%

± 3%

± 1.5%

± 3%

Max. pressure loss mbar≤ 2≤ 2≤ 2
Display range max. m³/h99999.999899999.999899999.9998
Display range min. m³/h0.00020.00020.0002
Accuracy classclass
Cyclic volume dm³1.21.21.2
Pulse value m3/pulse0.010.010.01
Weight kg2.22.22.2

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