Introduction
The Rheonik RHE 42 Coriolis Mass Flow Transmitter Ex de Field Mount is a high-performance, explosion-proof field-mounted flow measurement solution engineered for precision-critical industrial applications. Leveraging advanced digital signal processing (DSP) technology in combination with RHE’s high-accuracy sensors, the RHE 42 achieves an exceptional mass flow measurement uncertainty of up to ±0.05%, making it ideally suited for demanding processes such as filling, batching, and bottling, as well as any application requiring superior accuracy and long-term measurement stability. Designed for seamless integration into large-scale plant infrastructures, the transmitter supports a comprehensive range of industrial communication protocols, including Foundation Fieldbus, Modbus TCP/IP, and Profibus PA, ensuring compatibility with modern control systems and distributed automation architectures. Its robust Ex de-certified enclosure allows safe and reliable installation in hazardous areas, while maintaining high operational integrity under harsh environmental conditions. The RHE 42 is a fully specified, scalable solution tailored for complex process environments where precision, reliability, and connectivity are critical.
- Measures mass flow, volumetric flow, density, and temperature with high precision
- Provides versatile outputs: 2 × analog, 2 × frequency/pulse, and 2 × digital status signals
- Supports inputs: 2 × digital channels for system integration and control functions
- Offers extensive connectivity: PC USB / RHECom, RS-485 / Modbus RTU, Modbus TCP, Foundation Fieldbus, and Profibus PA
- Optional backlit color LCD for enhanced on-site visualization and configuration
- Certified for installation in hazardous areas (Ex de protection)
- Incorporates Assurance Factor for enhanced measurement reliability and confidence
General Specifications
| Enclosure Material | Powder-coated aluminum |
| Enclosure Rating | IP65/Type 4, optional IP66-67/Type 6 |
| Ambient Temperature |
-20 to +60°C / -4 to +140°F, optional -40°C to +65°C / -40°F to 149°F |
| Dimensions |
Enclosure approx. 144 x 108 x 139 mm / 5.67 x 4.25 x 5.47 in |
| User Interface and Configuration |
Local Display Version |
| Connection to Sensor | Integral/Compact to sensor or remote mount with 3m/10m cable |
| Cable Entries | 2 x ½” NPT for power and I/O |
| Computer Connection | Via Modbus RTU to PC |
| Totalizers |
6 x resettable forward, reverse, and net totalizers for mass and volume |
| Analog Outputs |
Up to 2 x 4-20mA outputs, active or passive |
| Pulse/Freq/Status Outputs |
Up to 2 configurable pulse/frequency/status outputs (IEC60946) |
| Digital Inputs |
Up to 2 configurable control inputs (IEC60946) |
| Digital Data Communications | HART, Modbus RTU, Ethernet (Modbus TCP/IPv4), Foundation Fieldbus H1 (FISCO), Profibus PA |
| Power Supply | 12-24 VDC +/- 10%, 2W typical, 4W maximum |
| Hazardous Area Approvals | ATEX/IECEx and cCSAus |
