Smart Field Devices - Sensors and Actuators
Modern process plants are under increasing pressure to deliver higher availability, stable control, cost-effective operation, and maximum safety. Intelligent field devices—such as sensors and actuators—provide a central foundation for this. They no longer merely supply measured values, but also comprehensive diagnostic and condition data—information that enables a whole new level of monitoring. When properly integrated, intelligent field devices deliver real added value—throughout the entire life cycle of a plant.
That is why smart field devices have become indispensable
Intelligent sensor technology detects malfunctions, deviations, and drift long before they affect the process. Sensors continuously measure data and key information from the industrial environment. Actuators respond to these signals and support stable process control in complex systems. This enables:
- Higher System Availability
- More Precise Control & More Stable Processes
- Fewer unplanned maintenance calls
- Lower spare parts consumption
- Better documentation and traceability
- Reliable Data for Predictive Maintenance
In the industrial sector, many facilities already have smart devices for modern applications—but only a few are using them to their full potential.
Typical Challenges in Practice
- 1
Diagnostic potential remains untapped
HART, Fieldbus, Profinet, and Ethernet-APL provide diagnostic data—but this data is often not communicated to the control system. Yet sensors and actuators could capture significantly more information and provide important data for other applications.
- 2
Errors start at the equipment - not in the process
Incorrect installation locations, unfavorable flow profiles, EMC issues, or unclear parameter settings can cause sensors to provide inaccurate measurements. If sensors and actuators are not optimally coordinated, this can result in erroneous signals and changes in process behavior.
- 3
Lack of continuity in the measurement chain
The data does not reach where it is needed: in PLCs, DCSs, HMIs, or CMMSs. Modern systems must be able to reliably collect, process, and communicate information across systems.
- 4
Documentation and Quality Assurance
Condition assessments must be traceable and verifiable—consistently and transparently. Long-term projects and sensitive industrial applications, in particular, require thorough documentation.
How Smart Field Devices Really Add Value in Operations
We ensure that modern field devices are properly specified, installed according to the manufacturer’s specifications, and fully integrated into the automation system. This includes parameterization, hookups, EMC-compliant cabling designs, signal paths, and seamless integration into PLC/DCS systems.
Implementation: From Field Devices to the Control Room and Beyond
Selection and Configuration
- Device Profiles, Threshold Values, Diagnostic Profile
- Selection of Measurement Methods and Materials
- Configuration of Alarms and Error Messages
Installation, hookups, EMC-compliant signal routing
- Optimal Installation Locations
- Avoiding Interfering Factors
- Installation Guidelines for Sensors and Actuators
Signal Pathways and Communication Structure
- Integration with:
- 4–20 mA + HART
- Profibus PA / Foundation Fieldbus
- Industrial Ethernet / Profinet
- Ethernet-APL
Loop Checks, Functional Tests, Calibration
- As-built documentation
- Test reports and acceptance inspections
- Validation of measurement chain quality
Modern Communication Standards for Smart Devices
To ensure that diagnostic data can be used reliably, it must be transmitted via stable communication channels. We design and implement communication architectures tailored to the process and the specific environment:
The following are particularly important:
- 4–20 mA + HART
- Profibus PA / Foundation Fieldbus
- Industrial Ethernet / Profinet
- Ethernet-APL for a Full Range of Diagnostics
These technologies make it possible to efficiently collect information and signals from various systems and process them intelligently.
Brownfield: Retrofitting Smart Field Devices—Without Downtime
Modern diagnostic functions can also be put to efficient use in existing and older systems: By utilizing existing equipment, strategically adding smart sensors, and optimizing signal paths, a solid foundation is created for state-of-the-art condition monitoring approaches. A phased migration to modern communication standards, along with seamless integration into existing PLC and DCS systems, makes it possible to implement modernization during ongoing operations—without downtime and with clearly measurable added value. This allows changes to be implemented in a controlled manner, existing systems to be expanded, and new projects to be carried out efficiently. Sensors and actuators can often continue to be used and supplemented as needed.
Implementing Safety Measurement Chains Reliably
Smart field devices support safety functions by:
- Sensor Integrity Monitoring
- Automatic Diagnostic Alerts
- Precise Test Intervals
- Improved Proof-Test Strategies
- Minimized False Alarms
This significantly improves operational safety, as modern sensors and actuators reliably process critical signals and detect dangerous changes early on.
Your Benefits at a Glance
- Stable, precise process control
- Higher availability through early detection of deviations
- Reduced downtime and maintenance costs
- Clean, traceable measurement chains
- Documented quality throughout the entire service life
- A realistic basis for predictive maintenance
FAQ - Sensors and Actuators
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