METRA Energie-Messtechnik GmbH

- Model EWZ 211.7 - Differential Pressure Heat Measuring Meters

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Plausibility check during operation possible . Also suitable for thermo oils and water / glycol mixtures

  • Function
  • Flow and heat quantity determination of liquids

Technical properties

  • nominal diameter DN 15 to DN 250 (bigger on request)  
  • flow range 5 m3/h to 1.250 m3/h
  • pressure rating PN 16 / PN 25 / PN 40
  • operating temperatureup to 350 °C
  • optionally silicone free
  • application area: water, water-glycol-compounds, thermo oil, de-ionised water
  • no moving parts in the flow
  • all parts contacted with fluid as stainless steel
  • long term stability, because of automatically hydraulic zero balance and self test
  • plausibility check during operating possible
  • low-maintenance
  • with PTB approval (official verification possible within Germany)
  • signal output:
    • standard 2x (0)4-20 mA / 2x frequency / pulse / status, M-Bus / Modbus (optionally up to 6x (0)4-20 mA, 6x frequency / pulse / status, additional M-Bus interface, RS 485, Ethernet interface)
  • extensive data logger function

  • approvable acc. to K7.2 (PTB)
  • insensible to magnetite Deposition
  • plausibility check during operation possible (EKZ 211.7)
  • little residual pressure loss
  • optionally silicone free (EKZ 211.7)
  • performance testing of cold Generator

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