Contrec 515 Rate Totaliser

500 3 4 large


  • Tailored for differential pressure mass meters with single or stacked transmitters
  • Generic differential pressure flow calculations
  • Uses IAPWS-IF97 steam calculation
  • Suitable for Water, Saturated and Superheated steam applications
  • Allows for square law and non-linear correction
  • Selection of second language and user tags
  • RTC logging with over 1000 entries
  • Infra-red communications port on front panel
  • Pulse width and scaling of pulse output
  • 4-20mA retransmission
  • Selectable protocols on serial ports including Modbus RTU and printer output
  • Front panel adjustment of 8-24V DC output voltage
  • Backlit Display
  • LCD Backup

Steam Computer - DP Meter (Mass Span)

The Contrec 515 Panel Mount Rate Totaliser measures the volume, mass and energy content of steam by using single or stacked differential pressure mass flow inputs in conjunction with a temperature and/or pressure input.
A selection of various modes makes it suitable for many steam applications. The instrument calculates the flow according to generic differential pressure equations and incorporates the conditions at which the flowmeter was calibrated.
The instrument calculates the mass flow and energy according to the IAPWS Industrial Formulation (1997) for the thermodynamic properties of steam. The equations use pressure and temperature values to determine the specific volume and the specific enthalpy.


The steam energy calculations are based on the IAPWS Industrial Formulation (1997).

Superheated steam regions are:

  • 0°C < t < 800°C P < 100MPa
  • 32°F < t < 1472°F P < 14500psia
  • 800°C < t < 2000°C P < 10MPa
  • 1472°F < t < 3632°F P < 1450psia
  • Saturated steam regions are:
  • 0°C < t < 374°C (critical temperature)
  • 32°F < t < 705°F
  • P < 22MPa (critical pressure)
  • P < 3190psia
  • Water region is:
  • 0°C < t < t saturation at system pressure
  • 32°C < t < t saturation at system pressure
  • Formulas
  • Volume flow = Mass flow x Specific volume
  • Energy flow = Mass flow x Specific enthalpy

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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