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E+H EngyCal RH33 BTU meter

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E+H EngyCal RH33 BTU meter E+H Electromagnetic Flow Meter and BTU Meter Energy Measurement

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E+H_EngyCal_RH33.pdf (3.55 MB)

Custody transfer BTU meter for recording heat quantities of water

The BTU meter RH33 is used in applications with liquid energy carriers.
It calculates the thermal energy of water acc. to EN1434, glycol/water mixtures or other fluids such as thermal oils. Temperature sensor matching using calibrated temperature sensors is done in the device. 
Potential for cost savings can be shown by using the software available as an accessory.
The device has a custody transfer approval and allows bi-directional measurement, e.g. charging/discharging of a heat accumulator.


  • Transparent energy consumption helps you save on energy costs
  • Calibrated, electronically paired temperature sensors ensure the highest accuracy and enable replacement of individual temperature sensors even for certified devices in the field (without reapproval!)
  • Tariff counter for requirements-based billing
  • Detailed data logging of current and counter values and of error messages, off-limit conditions and changes to operating parameters
  • Standard models are suitable for connecting and supplying all common volume flow transmitters and temperature measuring points
  • Remote readout via Ethernet and fieldbuses
  • Verified and certified reliability and accuracy
Field of application

Recording and billing the quantities of heat and cold in:
  • Heating circuits
  • Cooling circuits
  • Combined heating and cooling circuits
Typical application areas in industry, long-distance heat networks and building automation.

Features and specifications

Measuring Principle Energy manager
Function Monitoring and billing of energy in heating and cooling applications as well as combined heating-and cooling circles.
Typical applications can be found in industries, district heating and building automation. 
Certification CE, UL listed, CSA GP, MID 004 (custody transfer) according EN1434 (water/other liquids) and OIML R75
Input 1x Puls/Analog,
2x RTD/Analog,
Loop power supply 24V DC (+/-16%)
Output 1x 4...20mA,
2x digital (Open Collector)
Relay output 2x
Auxiliary power supply Low voltage power supply: 100 bis 230 V AC (-15% / +10%); Small voltage power supply: 24 V DC (-50% / +75%), 24 V AC (±50%) 
Dimensions (wxhxd) 144 x 144 x 103.1 mm
(5.67" x 5.67" x 4.06")
Software Calculated Values: 
Energy, volume, density, enthalpy & enthalpy difference,
temperature difference; 
Counters: volume, mass, energy, counter in case of failure 
Optional: tariff 1, tariff 2 or seperated heating energy, cooling energy, bilance energy
Operation 3 button on site or via FieldCare; read out of historical / logged data via Field Data Manager Software (SQL database and visualization interface), selectable language
Display 160 x 80 Dot-Matrix LCD with white backlit, colour change in case of alarm event, active display area 70 x 34 mm
Others electronic temperature sensor matching via CvD coefficients, logbook measured values, custody transfer logbook, event logbook, limit monitoring
Calculations IAPWS-IF97

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