METRA Energie-Messtechnik GmbH

- Model EDZ 150.1 (157.1) - Differential Pressure Meter

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Measuring and registering the standard volume, the volume or the mass of technical gases and measuring and registering the mass or energy of steam. Specially developed for high-precision billing measurements (compressed air contracting and steam contracting). Major advantages are the short required inlet- and outlet sections and the small residual pressure loss. 

Function

  • measuring and registering the standard volume, the volume or the mass of air, nitrogen, carbon dioxide, argon, etc. (with pressure and temperature compensation)
  • measuring and registering the mass or energy of steam

Technical properties

  • highly suitable for billing purposes
  • traceable standardized measurement, based on international valid rules and regulations, large confidence range
  • very short needed inlet and outlet pipes (typical 8x DN / 0x DN), with an additional uncertainty of 0,5 % calculated, the needed inlet pipe is 4 x DN
  • small residual pressure loss (typical 100 to 150 mbar)
  • wear resistant and dirt insensitive (venturi effect)
  • insensitive to dampness and vibrations
  • application areas compressed air and other technical gases
  • compact, highly-integrated measuring system (pressure and temperature compensationintegrated in the measuring device). Therefore, easy and cost-effective installation
  • wide dynamic range (20 : 1) and small measurement uncertainty (1 % of measured value)
  • fast data acquisition and calculation (approximately 10 times per second)
  • long term stability, because of automatically hydraulic zero balance and self test
  • plausibility and accuracy test during operation
  • low-maintenance
  • 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)
  • parametrisation at PC-Software and/or manual at key pad EMC saved plastic housing for wall mounting (optional with separate display)
  • optionally with two counters - e.g. for combined heat-/cold measuring or   bidirectional measuring
  • power supply 230 VAC (optionally 24 VDC)

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