Diaphragm meters

Diaphragm meters are displacement flow meters where the flow channels are designed to guarantee optimum flow conditions and a low pressure loss. All of the meters are approved for custody transfer measurement by the German PTB and to EN 1359 by German DVGW. They are suitable for measuring natural gas and a variety of technical gases at up to 0.5 bar. The approved gas temperature range is -20 °C to +50 °C. The diaphragm meters BK-G 1.6 up to G 100 are fitted with a pulse magnet as standard. This allows to retrofit a low-frequency pulser of the IN-Z61 type.

bk g1pt6 bk g6

Commercial Diaphragm Meters, BK-G10 to BK-G25

These compact meters are available in co-axial or two-pipe versions with a pressed steel housing. The measuring unit operates on the principle of pneumatic control. This guarantees low noise, long-term stability and high accuracy.

Cyclic volume:

  • BK-G 10 : 6 litres
  • BK-G 16 : 6 litres
  • BK-G 25 : 12 litres

Rangeability :

  • BK-G10 : 0.1 - 16 m³/h
  • BK-G16 : 0.16 - 25 m³/h
  • BK-G25 : 0.25 - 40 m³/h

89 EI BK G40 65 k

Commercial Diaphragm Meters, BK-G40, BK-G65 and BK-G100

BK-G40, BK-G65 and BK-G100 are compact, light-weight industrial diaphragm gas meters that have been designed to meet the highest demands with respect to measuring accuracy and safety. The innovative new developments are based on the experience of many decades. The gas meters are supplied with screwed cases made of deep-drawn steel sheet as a one-pipe version and – for horizontal and vertical installations – as a two-pipe version.

Cyclic volume:

  • BK-G 40: 18 dm³
  • BK-G 65: 24 dm³
  • BK-G100: 48 dm³

Rangeability :

  • BK-G 40: 0.4 - 65 m³/h
  • BK-G 65: 0.65 - 100 m³/h
  • BK-G100: 1.0 - 160 m³/h


IN-Z61 is a retro-fittable Low Frequency (LF) pulser for all Elster-Instromet diaphragm gas meters BK-G1.6 to BK-G100.

113 EI IN Z61 k

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If you require further information on this product or would like a quotation, please contact dp-flow on:

sales +44(0)1865 600245