Rheonik has more than twenty years of experience in the field of Coriolis mass flow meter design and development. Beginning in 1984, Karl Küppers began the design of a mass flow meter based upon the Coriolis effect that later became the patented Omega tube Coriolis mass flow meter manufactured by Rheonik today.
After the exhaustive testing of many different designs, the Omega tube meter with torsion rods and mass bars was granted a patent based upon its unique operation and construction features. Compared to other meter designs, the Rheonik Omega tube design offers outstanding performance and mechanical reliability.
Rheonik was founded in 1986 for commercial production of the Rheonik mass flow meter range. Based originally in the town of Maisach near Munich, Germany, the company grew quickly because of widespread success of the Rheonik design. To accommodate increased demand, Rheonik relocated in 2003 to a larger facility in Odelzhausen with greater production and office space.
Rheonik manufactures one of the largest range of Coriolis mass flow meters in the world for customers globally, making it one of the world leaders of Coriolis mass flow meter development and manufacture.
At the factory and in regional offices, Rheonik maintains a team of expert application and service engineers, offering best fit technology identification and specification all the way through to on-site commissioning and in-depth, application troubleshooting and resolution. A factory-trained sales and service network provides local service and support worldwide.
The RHEONIK mass flow meter consists of one of the RHM series flow sensors and one RHE series transmitter. The remote unit RHE 07/08 is for installation in a safe non-Ex area and is connected to the sensor via a single multi-conductor cable. Please note, that the types RHE 07/08 and all sensor articles are available in non Ex-versions (without Exnameplate). The RHE 11 (Ex d) may be installed and operated in hazardous Ex-areas (Zone 1 or 2). Ex-series sensors RHM (with Ex-Label) are, when connected with an Ex- Transmitter, made for installation inside hazardous areas (Ex-zone 0, 1 or 2). The coriolis transmitter RHE includes seven printed boards which can be replaced during servicing. The remote electronic unit consists of two bent measuring loops in the shape of an omega.
Coriolis Mass Flow Sensor
A Mass Flow Meter operating on the “Coriolis principle” contains a vibrating tube in which a fluid flow causes changes in frequency, phase shift or amplitude. The sensor signal is fed into the integrally mounted pc-board. The resulting output signal is strictly proportional to the real mass flow rate, whereas thermal mass flow meters are dependent of the physical properties of the fluid. Rheonik Coriolis mass flow measurement is fast and very accurate.
Rheonik Coriolis flow meters work on the principle that the inertia created by fluid flowing through an oscillating tube causes the tube to twist in proportion to mass flow rate. Many Coriolis meters have two tubes. They are made to vibrate in opposition to each other by means of a magnetic coil. Sensors in the form of magnet and coil assemblies are mounted on the inlet and the outlet of both flow tubes. As the coils move through the magnetic field created by the magnet, they create a voltage in the form of a sine wave. These sine waves are the key to measuring mass flow.
Rheonik Coriolis mass flow meters are the most accurate flow meters made. While many magnetic flow meters have accuracy in the range of 0.5 percent, many Coriolis flow meters achieve accuracy of 0.1 %. It is the high accuracy of Coriolis flow meters that is one of the major reasons for their extremely rapid growth over the past five years. Companies that need flow meters for custody transfer, or want highly accurate measurements in terms of mass, have a good reason to select Coriolis flow meters also very easy to installation.
All Rheonik coriolis mass flow meters are based on a patented Omega tube design with increased signal-to-noise ratio, for excellent performance and reliability. The combination of a patented torsion rod swinger with the Omega shape and support bars results in high accuracy measurement independent of pressure, even at very low flow velocities. RHM coriolis mass flow sensors are extremely resistant to gas bubbles entrained in the process stream, and are unaffected by viscosity, density, extreme temperatures, and pressure changes. There’s a Rheonik RHM flowmeter for nearly any flow application range.
After long testing cycles for various construction types, the Omega shaped torsion oscillator with its mass bars and torsion rods was brought to the patent offices. The design got patented based on its unique operational and construction features.
The typical Omega shaped Rheonik Coriolis mass flow meter. All Rheonik meters are principally based on the design shown beside. No other design offers this degree of versatility and rangeability:
- Measurement of liquid and gaseous fluids
- Flow rates from 0.002 to 30,000 kg/min (0.004 to 66,000 lbs/min)
- Diameters up to 12 inch / DN 300
- Pressure over 1,000 bar (14,500 psi)
- Temperature from -196°C to +395°C (-320°F to +743°F)
- Hazardous area certified versions available (ATEX, CSA etc.)
- Available in stainless steel, Alloy C22, Duplex, Tantalum and others
Applications
Typical applications include:
- General Flow Control
- Plant Balance
- Additive Dosing
- High Temperature Fluids
- Viscous Fluids
- Mixing, Blending, Batching
- Package and Container Filling
Kind of Coriolis Mass Flow sensor from RHEONIK
- Small Size coriolis Mass Flow Sensor
- Ideal for embedded systems and precise small flow applications
- Medium Size coriolis Mass Flow Sensor
- Suited to industrial and process flow control and monitoring
- Large Size coriolis Mass Flow Sensor
- Perfect for material movements in small and wide scale operations
Coriolis Mass Flow Transmitter
Inside the measuring sensor, there are precision tubes that are energized by an electromagnetic drive system, which itself is fed by the transmitter, to vibrate at their natural frequencies. When a liquid or gas flows through the vibrating tubes, it is subjected to additional deflection due to the degree of inertia that is generated. This deflection is recorded electronically by two velocity sensors and a high-precision electronic time delta. This measured quantity is proportional to the mass flow rate.
A further conversion into physical units is done in a purely digital manner using a signal processor in the transmitter. At the same time, all of the appliance’s functions are constantly monitored. Should any disruptions occur, all of the errors that have occurred are immediately reported in the display.
This significantly reduces the costs of spare parts for the installed flow sensor/transmitter. During the factory calibration, the mass flow sensor can be calibrated independently of the transmitter. All sensor-specific calibration data can be programmed using magnetic switches located on the front panel. To achieve this, the instrument does not need to be opened. All of the relevant data is buffered in a non-volatile semiconductor device (EEPROM).
The transmitter has a 4 to 20 mA analogue output with programmable span, which is proportional either to the measured mass flow rate or the temperature; it also has an impulse output that supplies mass-proportional impulses. All of the outputs and measuring functions can be verified at any time by the user by using the diagnostic mode in the appliance. The maintenance or new calibration intervals can be monitored via a run-time counter. For service or repair purposes, the transmitter and flow sensor can be replaced independently of each other.
The RHEONIK mass flow meter consists of one of the RHM series flow sensors and one RHE series transmitter. The remote unit RHE 07/08 is for installation in a safe non-Ex area and is connected to the sensor via a single multi-conductor cable.
Please note, that the types RHE 07/08 and all sensor articles are available in non Ex-versions (without Exnameplate). The RHE 11 (Ex d) may be installed and operated in hazardous Ex-areas (Zone 1 or 2). Ex-series sensors RHM (with Ex-Label) are, when connected with an Ex- Transmitter, made for installation inside hazardous areas (Ex-zone 0, 1 or 2). The transmitter RHE includes seven printed boards which can be replaced during servicing. The remote electronic unit consists of two bent measuring loops in the shape of an omega.
Kind of Rheonik Coriolis Mass Flow Transmitter
1. RHE 07 Coriolis Flow Transmitter
The RHE07 is designed to sit in a standard 19″ Eurocard style rack. The transmitter has two Eurocard connectors on the back to allow the unit to be plugged into an integrated rack system directly. For standalone applications, the RHE07 is easily adapted to panel mount and has a screw terminal adapter accessory to allow field wiring to be connected directly to the rear of the unit. The RHE07 transmitter can be used with an RHM sensor in a hazardous area (RHE07 in safe area). CSA certified versions of the RHE07 must be mounted in a safe area.
The RHE07c is a modified version of the RHE07 that provides a second pulse output 90 degrees out of phase with the standard output and the facility to physically lock and apply a seal to the unit so that the configuration of the instrument cannot be tampered with.The RHE07c transmitter can be used with an RHM sensor in a hazardous area (RHE07c in safe area).
2. RHE 08 Coriolis Flow Transmitter
The RHE08 is designed to sit in a standard 19″ Eurocard style rack. The transmitter has two Eurocard connectors on the back to allow the unit to be plugged into an integrated rack system directly. For standalone applications, the RHE07 is easily adapted to panel mount and has a screw terminal adapter accessory to allow field wiring to be connected directly to the rear of the unit. The RHE08 transmitter can be used with an RHM sensor in a hazardous area (RHE07 in safe area). CSA certified versions of the RHE07 must be mounted in a safe area.
The RHE08 is a modified version of the RHE08 that provides a second pulse output 90 degrees out of phase with the standard output and the facility to physically lock and apply a seal to the unit so that the configuration of the instrument cannot be tampered with.The RHE07c transmitter can be used with an RHM sensor in a hazardous area (RHE07c in safe area).
3. RHE 11 Coriolis Flow Transmitter
The RHE11 multifunction transmitter has a corrosion resistant explosionproof enclosure perfect for demanding applications in extreme environments. The unit features behind glass controls and an intuitive operator menu.The
RHE 11 (Ex d) may be installed and operated in hazardous Ex-areas (Zone 1 or 2). Ex-series sensors RHM (with Ex-Label) are, when connected with an Ex- Transmitter, made for installation inside hazardous areas (Ex-zone 0, 1 or 2). The transmitter RHE includes seven printed boards which can be replaced during servicing. The remote electronic unit consists of two bent measuring loops in the shape of an omega.
4. RHE 12 Coriolis Flow Transmitter
The RHE12 explosionproof mass flow transmitter features standard HART communications and magnetic behind-glass controls. The RHE12 is supplied with a standard post mounting kit and a choice of integrated sensor cables.
The RHE 12 transmitter is equipped with a 24 VDC mains supply. For trouble-free operation, the power supply must maintain the specified nominal voltage of +- 10%. When connecting the transmitters, always ensure that the power supply is switched off. The earthing for the power supply should be connected using the relevant RHE earthing.
4. RHE 14 Coriolis Flow Transmitter
The RHE14 is a low cost mass flow transmitter ideal for OEM and embedded system use. The RHE14 is DIN rail mount and configured through a native RS232 data port. The RHE14 can be used with all RHM Coriolis Sensors.
RHE14 transmitters can be used with all sizes of RHM flow sensor. The RHE14 is compact and ideal for OEM applications. I/O includes 4-20mA, pulse, flow direction and RS232 serial data. Programming and configuration by SensCom™ software.
6. RHE15 Coriolis Flow Transmitter
The RHE15 is an expansion module providing connectivity for an RHE14 transmitter to a PROFIBUS-DP system. The unit can optionally act as a gateway for other local instruments without PROFIBUS functionality.
Optionally includes inputs for 1 pulse and 3 analog signals from any other instrument(s)without PROFIBUS functionality. Signals are retransmitted digitally on PROFIBUS
Function : Conversion of three Analog and one Pulse Input from any Transmitter to PROFIBUS
7. RHE16 Coriolis Flow Transmitter
The RHE16 is a state-of-the-art multifunction DIN rail mount Coriolis transmitter With full MODBUS capability, the RHE16 provides flow, density and temperature measurement to any supervisory control system. The RHE16 can be supplied preinstalled in a local electrical box mounted on any RHM flow sensor. Neat and convenient, the unit has a tiny footprint and represents installation savings. For high and low temperature applications, the electrical box is set off of the sensor body to protect the transmitter from temperature extremes and to allow for the sensor to be fully insulated. Compact mount versions can be installed in ATEX Zone 2 areas. See RHM sensor data sheets for full dimensions and ordering details.
8. RHE 21 Coriolis Flow Transmitter
9. RHE 26 Coriolis Flow Transmitter
The RHE26 and RHE27 transmitter models are designed to be installed through a control panel or enclosure door so that the terminals on the rear are protected from water and moisture ingress. The front panels of the RHE26 and RHE27 provide a protection class of IP54. They are not suitable for installation in wash down or other “wet” areas. For RHE26 and RHE27 units requiring 12 to 24V DC power, the use of a properly grounded (PELV) supply is highly recommended. The use of shielded cables for all I/O signals is recommended to prevent interference from high level EMI.
10. RHE 27 Coriolis Flow Transmitter
The RHE26 and RHE27 transmitter models are designed to be installed through a control panel or enclosure door so that the terminals on the rear are protected from water and moisture ingress. The front panels of the RHE26 and RHE27 provide a protection class of IP54. They are not suitable for installation in wash down or other “wet” areas. For RHE26 and RHE27 units requiring 12 to 24V DC power, the use of a properly grounded (PELV) supply is highly recommended. The use of shielded cables for all I/O signals is recommended to prevent interference from high level EMI.
11. RHE 28 Coriolis Flow Transmitter