All new field instrumentation devices are developed acc. to IEC 61058 in SIL 2/3 operation
Technology you can trust
Safe, reliable and simple to handle process instrumentation
for Safety Instrumented Systems
According to the latest global developments in terms of local implementations of plant safety systems, a strong growing demand can be seen in both, hardware and organisational needs.
Only fully reliable process automation hardware combined with a comprehensive safety management system will meet the future requirements of the process plants.
As a world leading manufacturer of process instrumentation and measurement solutions, KROHNE has implemented all relevant points into a comprehensive portfolio of measurement equipment, meeting the latest international safety standards, and incorporating advanced safety features.
The implementation of SIL into process devices requires not only certain engineering and circuit design, but also deep knowledge of the specifics of the meter type. KROHNE has gained decades of experience with different measuring technologies and meter types in critical applications, and continuously implemented this know-how into meter designs. Our SIL devices have proven themselves in extensive testing and field use and provide the quality and operational reliability to minimise risk in safety-related applications.
OPTIMASS – A world’s leading series of Coriolis mass flowmeters
The OPTIMASS series has covered all bases of all relevant applications around the globe for years. KROHNE offers the entire range of superior performance and high accuracy mass flowmeters. From small to large. For 0.00015 to 4600 t/h flows. For cryogenic applications or high temperatures up to +400 °C/+752 °F. For standard or demanding applications such as highly corrosive media or multiphase flows with a wide range of gas fractions and complex flow conditions.
OPTIMASS series with new MFC 400 converter
New MFC 400 converter – Novel features for safety-related applications
With the introduction of the new MFC 400 converter for the whole OPTIMASS series, extra features have become available throughout a wide range of applications in Safety Instrumented Systems.
- Fully developed for safety applications acc. to IEC 61508 2010
- Diagnostic coverage of >96 %
- Diagnostic test interval of less than one minute: this allows use in SIL 3 applications or in continuous demand mode, the highest specified levels of operation
- SIL 3 software certification ensures the lowest possible number of systematic software errors
- Fail-safe bus topologies and other hardware safety-relevant features
- The only Coriolis mass flowmeters on the market allowing secure wireless access via Bluetooth® or remotely via HART® even in safety-related applications
The only SIL certified Coriolis mass flowmeters on the market allowing Bluetooth® communication
Focus on safety
Safety in remote parametrisation
A plant safety management concept not only requires secure software and hardware components, but also must cover all the commissioning and maintenance of the relevant process automation equipment. For this reason, the MFC 400 converter software provides the most secure and versatile authentication concept for all remote access, fully certified via TÜV Rheinland.
The MFC 400 allows safety-relevant data to be changed via HART® signals using an FSK modem, even from the control room. Thus the operator no longer has any need to go out into the field to change any safety-relevant configuration.
This requires that all access levels are fully password protected, no matter whether the configuration is carried out remotely via HART®, via the local display, or via the OPTICHECK service tools.
Authentication concept of all the MFC 400 converters
Remote parameterisation of safety-relevant data via HART®
Enhanced online diagnostics
Developed acc. to IEC 61508/61511, the OPTIMASS Coriolis flowmeter series is designed to meet the highest safety as well as security standards. In order to achieve diagnostic coverage of >96 %, all OPTIMASS flowmeters have integrated continuous signal monitoring, redundant references and calibrations.
Redundant storage of all device configuration data allows the converter to be replaced at any time without the need for manual reconfiguration: This means higher safety and less effort for the end-user.
- Electronic hardware
- Humidity
- Failure of temperature sensor
- Corrosion / abrasion of the sensor
- Failure in measuring tube
- Failure in motion sensors or actuators
- Mechanical stress / external vibrations
Online diagnostics of Coriolis mass flowmeters
Partial proof test – Proof testing in the process
Proof testing of safety-related functions usually requires closing the line and demounting of the measurement and actuation equipment, at considerable cost and plant downtime. Partial proof tests can be carried out while the equipment is still built into the process and can be performed a lot easier than such a full test.
For this reason, a partial proof test procedure for the OPTIMASS series has been developed in conjunction with TÜV Rheinland.
Proof test coverage (PTC) of up to 82 % is thus provided without the need to remove the device. This ensures the safe operation of any safety-relevant function and helps to justify the lengthening of full proof test intervals.
Proof test coverage
Focus on simple handling
New simple local parameterisation concept
All parameters within the OPTIMASS Coriolis flowmeters follow an intelligent concept: only frequently used parameters appear on the first level of operation, allowing for clearly structured access to all relevant data.
Parameters seldomly used are only shown on an ‘expert‘ level. As a result, the operator needs less time for device parameterisation and configuration, at the same time accidental misadjustments are reduced to a minimum.
Parameterisation via the local display
The only Coriolis mass flowmeters on the market allowing wireless access to when in SIL mode
All OPTIMASS flowmeters with the MFC 400 converter are now available with secure Bluetooth® communication. OPTIMASS with sensors and electronics MFC 400 is therefore the first and only device on the market that allows wireless parameterisation and monitoring in safety-related applications.
Using the new OPTICHECK Flow Mobile app on mobile devices or FDT/DTM on laptops commissioning, parameterisation, verification, performance monitoring and application parameters can be managed on-site via a Bluetooth® connection (≺20 m/65.6 ft) – ideal for devices installed in inaccessible areas or EX Zone 1.
When in SIL mode, the meter allows reading of all parameters and running diagnostic functions, when in NON-SIL mode all OPTICHECK Flow Mobile functions are enabled.
Focus on reliability
Advanced Entrained Gas Management (EGM™)
Next to secure and safe operation of flow measurement equipment, the best availability and reliability are essential for smooth and efficient plant operation. In the past, Coriolis flow measurement of liquids with entrained gas was technically impossible and most meters stopped functioning when gas fractions in the medium exceeded 4-5 %.
Introduced in 2012, Entrained Gas Measurement (EGM™) for all OPTIMASS Coriolis mass flowmeters has overcome this challenge. The KROHNE OPTIMASS series is the only range of meters to offer a solution for all flow conditions at all gas volume fractions – from 0 to 100 % – as a standard feature (not a cost-added option).
New opportunities with EGM™ functionalityThe secret of 2-phase flow measurementMass or density – both are possible even with gas entrainment
EGM™ functionality has overcome many of the previously insoluble problems experienced with earlier versions of Coriolis meters. As well as easily coping with liquids mixed with gas, the OPTIMASS can cope with slurries also containing gases, and highly viscous fluids with plugs of gas entrainment.
EGM™ also helps to overcome problems of flow regimes where increased viscosity and the relative different velocity of the liquid and the gas affect the flow regime.
Without entrained gas, the desired regular oscillation of the tubes in the Coriolis mass flowmeter is undisturbed. Gas entrained in the liquid dampens this regular oscillation of the measuring tubes, and as the gas content increases, the oscillation can come to a complete stop.
To overcome this, KROHNE has developed powerful control algorithms. These algorithms allow the meter to maintain the oscillation and continue to operate even with complex flow regimes. Even during a complete transition from a pure liquid phase to a gas phase and back, i.e. from 0 to 100% gas content, the device won‘t stop the operation.
Coriolis flowmeters can measure the mass flow, volume flow and density of any fluid, whether it is aerated or not. Density measurement of single-phase fluids is common practice, but for traditional meters it becomes challenging when there is entrained gas.
In many applications where entrained gas is present, meters with EGM™ show excellent performance and repeatability for process control, batching, loading, offloading and transfer measurement.
Focus on better performance over the entire life cycle
myDevice – Smart service tools
All OPTIMASS flowmeters come with a comprehensive tool suite, to cover their entire life cycle. The smart service tools in the myDevice package make it a lot easier for you to commission, verify and monitor devices in the field. They provide detailed reports for proof test documentation of safety loops (IEC 61508, 61511) and also help you to create a detailed maintenance plan.
Via a serial number or AutoID acc. to DIN SPEC 91406 you get convenient access to all device-related assets such as manuals, approvals and calibration certificates.
A complete on-line training and tutorial portfolio rounds off the suite to help you resolve any questions about KROHNE Coriolis mass flowmeters.
- Wireless parameterisation and commissioning
- Verification with highest test depth without process interruption
- Detailed reports for proof test documentation of safety loops (IEC 61508, 61511)
- Device-specific assets via serial number or AutoID
- Step-by-step video tutorials
- 24/7 online course availability
Further information
OPTIMASS product pages
Get a quick overview of all OPTIMASS flowmetrs, technical highlights, target applications and product variants
OPTIMASS WebApp
Get a detailed 3D view of all instruments, check their technical data and see real life applications
Case Studies
Take a look at our application library, which gives many success stories about OPTIMASS flowmeters in the field
Free eLearning course Coriolis mass flowmeters
The course “Coriolis Mass Flowmeters“ deals with the Coriolis principle, the general functionality and operating mode
Free eLearning course EGM
The course “Entrained Gas Management in Coriolis Flowmeters“ gives an introduction on how to master liquid applications with entrained gas.
Free eLearning course SIL
Ten practical eLearning modules from TÜV NORD, KROHNE, SAMSON und PHOENIX CONTACT give an overview of the basic concepts and methods incl. many practical examples.
KROHNE SIL competence
With 100 years experience in process instrumentation and more than 15 years experience in functional safety acc. to 61508/61511, KROHNE has gained fundamental know-how in consultation, development and operation of safety-related applications.
Global support throughout the entire safety life cycle
Complete product portfolio for flow, level, pressure and temperature measurement
Comprehensive training tools, from online seminars to local trainings
Consulting in safety-related applications
Professional consulting around all safety-related topics is one of key drivers.
Especially in functional safety (SIL), KROHNE offers global support in all questions around the standards IEC61508/61511 throughout the entire safety life cycle. Beginning with the project phase, risk assessments, PFD calculation, proof testing up to decommissioning. KROHNE has many globally acting partners in its disposal, trying to provide the best support to its clients, all around the globe.
Large team of field service engineers and technicians
Training for safety-related topics
KROHNE Academy and Service Academy
KROHNE Academy is a series of seminars organised in collaboration with leading automation companies. Taking place in various countries, it addresses key operating issues, from plant safety to ways of increasing efficiency and controlling costs, and highlights possible solutions. Should your interest be more towards working “hands-on” with our devices, then our Service Academy is what you are looking for.
To fully address individual training needs, KROHNE organises tailor-made training sessions at any time, virtually anywhere in the world. All aspects starting from device-specific courses or legal aspects relating to functional safety (SIL) are covered.
Functional safety seminar at KROHNE headquarters, Duisburg, Germany
Tailor-made workshops at customer`s site
KROHNE Academy online – Web-based trainings for the process industry
KROHNE Academy online is an online eLearning platform focusing on industrial process instrumentation. It comprises electronic training courses with full audio, explaining measuring technology without relating it to specific manufacturers and live webinars.
KROHNE Academy not only gives you direct access to the deep knowledge and vast experience of KROHNE. You also get the latest information on standards and regulations from eLearning courses, such as “Functional Safety (SIL)“, which we develop in cooperation with our partners.
- Hands-on learning materials on process instrumentation, e.g. measuring principles, SIL
- Free and unlimited access to all courses, available in English, German, French, Russian, Chinese
- Learning can be done at your own pace with progress monitoring and course completion certificates
Instrumentation portfolio for safety-related applications
OPTIMASS 6400
Coriolis mass flowmeter for advanced process applications
H250 M40
Variable area flowmeter for liquids and gases
DK37 M8M
Variable area flowmeter for advanced low liquid and gas flows
DK32/34
Variable area flowmeter for low liquid and gas flows
OPTISWIRL 4200
Vortex flowmeter for utility applications and energy management systems
OPTIBAR DP 7060 with orifice plate
DP flowmeter for volume flow measurement of liquids, gases and steam
OPTIWAVE 5200
Radar (FMCW) level transmitter for liquids in storage and process applications
OPTIFLEX 2200
Guided radar (TDR) level transmitter for storage and process applications
OPTIFLEX 3200
Guided radar (TDR) level transmitter for liquids with hygienic requirements
OPTIFLEX 6200
Guided radar (TDR) level transmitter for solids from granulates to powders
OPTIFLEX 7200
Guided radar (TDR) level transmitter for advanced liquid applications
OPTIFLEX 8200
Guided radar (TDR) level transmitter for liquids at high temperature and pressure
OPTISOUND 3010
Ultrasonic level transmitter for basic applications
OPTIBAR DP 7060
Differential pressure transmitter for advanced applications and high temperatures
OPTISWITCH 3100
Vibration level switch for solid applications
OPTISWITCH 3200
Vibration level switch with cable extension for solid applications
OPTISWITCH 3300
Vibration level switch with rigid extension for solid applications
OPTISWITCH 5300
Vibration level switch for heavy-duty applications
OPTISWITCH 5100
Vibration level switch for process applications
OPTISWITCH 5150
Vibration level switch for liquids in hygienic applications
OPTISWITCH 5200
Vibration level switch with rigid extension for process applications
OPTISWITCH 5250
Vibration level switch with rigid extension for hygienic applications
SU 501
Level signal conditioner for vibrating level switches
OPTIBAR PC 5060
Pressure transmitter for advanced process pressure and level applications
OPTIBAR PM 5060
Pressure transmitter for process pressure and level applications
OPTIBAR DP 7060
Differential pressure transmitter for flow, level, differential pressure, density and interface measurements
OPTITEMP TT 51 C
Head-mounted temperature transmitter with universal dual input, galvanic isolation, HART® and SIL
OPTITEMP TT 51 R
Rail-mounted temperature transmitter with universal dual input, galvanic isolation, HART® and SIL
Contact us
KROHNE is a leading system provider in the field of industrial process measurement instrumentation. Employing over 4,000 people worldwide, KROHNE provides complete solutions for flow, level, pressure and temperature measurement, as well as for process analysis. In addition to these measurement devices, KROHNE offers commissioning, calibration and maintenance services. The name KROHNE stands for innovation, reliability and high-quality products.