If you’re working with Yokogawa equipment or considering legacy systems, understanding which products have been discontinued is crucial. This list covers some of the most notable Yokogawa products no longer in production, helping engineers, technicians, and industrial buyers make informed decisions about replacements, upgrades, or maintenance. Whether you’re troubleshooting old systems or planning future projects, knowing the history of Yokogawa’s discontinued offerings can save time and prevent costly mistakes.
Yokogawa DCS Centum CS 3000
The Centum CS 3000 was Yokogawa’s flagship distributed control system (DCS) for large-scale industrial processes. It offered high reliability, real-time control, and advanced process automation features. Yokogawa phased out this model in favor of the newer CENTUM VP series, but many legacy plants still operate with CS 3000 systems, making understanding its capabilities and limitations essential for maintenance and upgrade planning.
Yokogawa FLXA21 pH/ORP Transmitter
The FLXA21 was a popular digital pH and ORP transmitter known for its robustness and flexibility in chemical, water treatment, and food processing industries. It supported HART communication, allowing remote configuration and diagnostics. Yokogawa discontinued the FLXA21 in favor of newer models like the FLXA402, which offer enhanced features such as multi-channel support and improved user interfaces, but many facilities still rely on the FLXA21 for critical measurements.
Yokogawa AQ6370C Optical Spectrum Analyzer
The AQ6370C was a high-performance optical spectrum analyzer used in fiber optics testing and research. It provided detailed spectral analysis with high resolution, crucial for telecommunications and research laboratories. Yokogawa phased out this model as newer, more integrated solutions like the AQ6375 series emerged, but the AQ6370C remains valued in legacy systems and specialized applications.
Yokogawa WT5000 Precision Power Analyzer
The WT5000 was a highly accurate power analyzer designed for R&D and power quality testing in advanced electrical systems. It supported multi-channel measurements and high sampling rates. Yokogawa replaced it with the WT300E series, which offers similar accuracy with improved usability and connectivity, but many labs and manufacturing facilities still operate WT5000 units due to their proven reliability.
Yokogawa STARDOM FCN Series
The FCN series of field controllers provided flexible and scalable control solutions for industrial automation. They supported multiple communication protocols and were used in complex manufacturing setups. Yokogawa discontinued the FCN series as they shifted focus to the newer Stardom network-based controllers like the VDS series, but existing installations still depend on FCN controllers for ongoing operations.
Yokogawa ProSafe-RS Safety Instrumented System
ProSafe-RS was Yokogawa’s safety instrumented system (SIS) designed to enhance plant safety and compliance. It featured high availability and integrity for critical safety functions. The product was phased out in favor of Yokogawa’s newer safety solutions, such as the ProSafe Safety Manager, but many plants continue to use ProSafe-RS systems due to their proven track record.
Yokogawa AQ2200 Series Optical Power Meter
The AQ2200 series was a portable optical power meter used in fiber optic installation and maintenance. It supported various wavelengths and offered precise power measurements. Yokogawa replaced this series with the AQ2200A, which provides enhanced measurement capabilities and improved user interface, but the older AQ2200 units are still found in many field operations.
Yokogawa YTA Series Temperature Transmitters
The YTA series provided accurate temperature measurement and control in industrial processes. They supported HART communication and were known for their durability. Yokogawa discontinued the YTA series as newer models like the YTA510 and YTA620 emerged, but many existing plants still operate with YTA transmitters due to their reliability and widespread use.
Yokogawa AQ7280 Spectrum Analyzer
The AQ7280 was a compact spectrum analyzer used in RF and microwave testing. It offered high sensitivity and resolution for critical communications testing. Yokogawa phased out this model with the introduction of the AQ6370 series, which provides broader bandwidth and advanced analysis features, but the AQ7280 remains relevant in legacy setups and specific testing environments.
How to Choose
When selecting replacement or upgrade options for discontinued Yokogawa products, consider factors like compatibility with existing systems, technical specifications, and future scalability. Prioritize newer models that offer improved features, better support, and compliance with current industry standards. Also, evaluate the availability of technical support and spare parts, as these are crucial for maintaining operational continuity with legacy equipment.
Frequently Asked Questions
- Are discontinued Yokogawa products still supported? Support varies; some legacy systems may still receive limited support, but most discontinued products are phased out of official support channels.
- Can I upgrade my old Yokogawa system to a newer model? Yes, but it often requires system integration planning, compatibility assessments, and sometimes, hardware or software modifications.
- Why does Yokogawa discontinue products? Products are phased out to incorporate newer technologies, improve reliability, or streamline the product portfolio.
- What should I do if I still use a discontinued Yokogawa product? Consider planning an upgrade or retrofit to ensure continued support and compliance, especially for critical systems.
- Are replacement parts still available for discontinued products? Availability depends on the specific product; some parts may be scarce, requiring alternative solutions or refurbished components.
Final Thoughts
Discontinued Yokogawa products mark an important chapter in industrial automation history, reflecting technological progress and evolving industry standards. While legacy systems may still operate for years, planning for upgrades ensures continued reliability, support, and compliance. Staying informed about these discontinued items helps professionals make smarter, future-proof decisions for their automation and control needs.
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