 
                  Specs at a glance
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                              Input1x Puls/Analog 
 2x RTD/Analog
 Loop power supply 24V DC (+/-16%)
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                              Output1x 4...20mA 
 2x digital (Open Collector)
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                              Display160 x 80 Dot-Matrix LCD with white backlit 
 colour change in case of alarm event
 active display area 70 x 34 mm
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                              Calculationsheat quantity and heat quantity difference 
Field of application
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.
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.
Benefits
- 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 
Videos
Lean selection
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        Standard products 
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
 
                              - 
        Standard products 
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
- 
        Specialized products 
- Designed for demanding applications
Technical excellence
Simplicity
Variable
| FLEX selections | Technical excellence | Simplicity | 
|---|---|---|
| 
 Fundamental selection Meet your basic measurement needs | Technical excellence | Simplicity | 
| 
 Lean selection Handle your core processes easily | Technical excellence | Simplicity | 
| 
 Extended selection Optimize your processes with innovative technologies | Technical excellence | Simplicity | 
| 
 Xpert selection Master your most challenging applications | Technical excellence | Simplicity Variable | 
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                                                    Operating Instruction (BA)
 EngyCal RH33English version - 07/2021 Universal BTU meter EN 31/07/202128/12/201806/04/201607/10/201428/01/2014Language: English Version: 31/07/2021 File size: 3.9 MB File name: BA00290KEN_0721.pdf 
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                                                            Technical Information (TI)
 EngyCal RH33Custody transfer BTU meter for recording and billing heat and cold 
 quantities of water, water/glycol mixtures or other fluidsEN 30/09/202128/12/201807/02/201406/09/201108/04/2010Language: English Version: 30/09/2021 File size: 995.5 KB File name: TI00151KEN_0421.pdf 
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                                                            Operating Instruction (BA)
 EngyCal RH33Universal BTU meter EN 31/07/202128/12/201806/04/201607/10/201428/01/2014Language: English Version: 31/07/2021 File size: 3.9 MB File name: BA00290KEN_0721.pdf 
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                                                            Operating Instruction (BA)
 EngyCal RH33 and RS33 and Batch Controller RA33 Operating InstructionsAdditional operating instructions Modbus for BTU meter RH33, Steam 
 calculator RS33 and Batch Controller RA33EN 24/06/201616/11/2010Language: English Version: 24/06/2016 File size: 291.3 KB File name: BA01029KEN_1416.pdf 
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                                                            Operating Instruction (BA)
 FDM Field Data Manager Software MS20, MS21Data management and visualization EN 17/07/202504/10/202127/07/202109/05/201916/05/2017Language: English Version: 17/07/2025 File size: 5.9 MB File name: BA00288R09en_1325.pdf 
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                                                            Short Instruction (KA)
 EngyCal RH33Universal BTU meter EN 16/09/202122/09/201430/01/201401/08/201120/07/2010Language: English Version: 16/09/2021 File size: 2.2 MB File name: KA00289KEN_0421.pdf 
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                                                            Installation Instructions (EA)
 71144242Freischaltung einer Software Option EN 30/01/2025Language: English Version: 30/01/2025 File size: 1.9 MB File name: 71144242.pdf 
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                                                            Installation Instructions (EA)
 XPR0002-xxEinbauanteiltung zum Austausch CPU-Karte Rx33 EN 29/01/2025Language: English Version: 29/01/2025 File size: 2.1 MB File name: 71122642.pdf 
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                                                            Installation Instructions (EA)
 XPR0001-xxEinbauanleitung für den Austausch der Kommunikationkarte EN 30/01/2025Language: English Version: 30/01/2025 File size: 2.8 MB File name: 71122645.pdf 
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                                                            Installation Instructions (EA)
 XPR0001-xxEinbauanleitung Austausch Gehäusefront, Gehäuseunterteil, 
 ElektronikabdeckungEN 30/01/2025Language: English Version: 30/01/2025 File size: 2.7 MB File name: 71122644.pdf 
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                                                            Installation Instructions (EA)
 XPR0003-xxEinbauanleitung für den Austausch des Mainboard EN 30/01/2025Language: English Version: 30/01/2025 File size: 2 MB File name: 71122646.pdf 
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