Introduction
The Rheonik RHE 27 Coriolis Mass Flow Transmitter Panel Mount is a high-performance, multifunctional transmitter engineered for precise flow measurement and process control in demanding industrial applications. Designed for seamless integration into rack or panel-mounted configurations within indoor environments, the RHE27 combines advanced signal processing with robust communication capabilities to deliver accurate and reliable measurement data. It supports critical industry functions such as API standard volume correction and net oil calculation, making it particularly suitable for oil & gas, energy, and process industries requiring high-accuracy custody transfer and monitoring. With its flexible I/O architecture, comprehensive communication interfaces, and optional visualization features, the RHE27 ensures efficient system integration, real-time diagnostics, and enhanced operational visibility while maintaining compliance with international hazardous area certifications.
- High-precision measurement of Mass Flow, Volumetric Flow, Density, and Temperature for comprehensive process monitoring
- Flexible output configuration including 2 × Analog outputs, 2 × Frequency/Pulse outputs, and 2 × Digital status signals
- Integrated input channels with 2 × Digital inputs and 1 × Analog input for expanded control and system interaction
- Advanced communication interfaces, including PC USB (RHECom), RS-485 (Modbus RTU), and HART protocol over analog output
- Optional backlit color LCD display for clear, real-time visualization of process parameters and diagnostics
- Certified for hazardous environments with ATEX/IECEx and CSA approvals, ensuring safe and compliant operation
- Incorporates Rheonik Assurance Factor (RAF) for enhanced measurement accuracy, reliability, and long-term performance stability
General Specifications
| Housing | IEC 61554 Panel Mount Housing. Optional lockable front cover |
| Enclosure Rating | IP20 (front). IP54 with lockable front cover |
| Ambient Temperature | -20°C to +60°C (-4°F to +140°F) |
| Dimensions | 96 x 144 x 61/75 mm (3.78 x 5.67 x 2.4/2.95 in) |
| Display | Backlit color LCD. The screen changes color to indicate a warning or an error |
| Weight | 0.55 kg (1.2 lb) |
| Operation | 3 x front panel operator buttons for all menu navigation and settings |
| Sensor Connection | Pluggable cage clamp terminal strip. Cable available in lengths up to 100 m / 328 ft for connection to a remote sensor |
| Analog Outputs |
Up to 2 x 4-20mA outputs, active/passive, compl. to NAMUR NE-43 |
| Digital Outputs | Up to 2 x configurable status outputs (IEC60946) |
| Pulse/Frequency Outputs | Up to 2 x configurable pulse/frequency. outputs (IEC60946), max 10 kHz |
| Digital Inputs | Up to 2 x configurable control inputs (IEC60946) |
| Analog Input (optional) | 1 x 4 – 20 mA analog input (active) for two-wire external sensor |
| Power Supply | 100-240 VAC (48 to 62 Hz), 5W or 12-24 VDC +/- 10%, 4W |
| Digital Data Communications |
Modbus RTU (RS485) |
| Hazardous Area Approvals | ATEX / IECEx, cCSAus for RHE27 in ordinary area, RHM in all zones – please see Part Number Code page. Others available on request |
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