Industrial Temperature Measurement in Real-World Conditions — Case Studies from Endress+Hauser and VEGA

Accurate temperature measurement is only half the story in industrial environments. In demanding processes such as steam power plants or aggressive chemical reactions, the real challenge lies in designing measurement solutions that remain stable, robust, and maintainable over years of operation.

Below are two practical case studies illustrating how temperature measurement is engineered in harsh conditions.

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Case Study 1 — Optimized Temperature Control in Steam Power Plants (Endress+Hauser)

Application Background

Accurate and fast temperature measurement in steam power plants is crucial to prevent damage to plant components, optimize energy consumption, and guarantee system safety. In stand-by operation of a turboset, maintaining proper steam line temperature avoids condensation, reduces wear, and enables quick startup.

Process conditions:

• Primary steam: ~150 bar, 450–500 °C
• Secondary steam (stand-by): 10–15 bar, up to 220 °C
• Desired standby temperature: ~180 °C

Challenges

The existing invasive temperature measurement used a thick barstock thermowell, which caused:

• Slow response and inaccurate readings
• Complex installation requiring pipe cutting, welding, and approvals
• Risk of thermowell fatigue and downtime

Technical Solution

The solution employed non-invasive surface temperature measurement with the following components:

• Sensor: iTHERM SurfaceLine TM611 — surface-mounted thermometer for metal pipes
• Transmitter: iTEMP TMT162 (4–20 mA/HART) for DCS integration

Installation highlights:

• No pipe opening or welding required
• Fast installation and flexible positioning on the pipe
• Quick integration into the control system

Engineering Benefits

• Fast and accurate temperature feedback for optimized control
• Minimal downtime and installation effort
• Reliable replacement for enthalpy calculation workaround
• Flexible sensor placement for future adjustments
• Permanent solution now in continuous operation

This case demonstrates that in steam power plants, non-invasive temperature measurement can significantly improve standby operation control while reducing installation complexity and cost.

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Case Study 2 — Chemical Process Measurement Stability (VEGA)

Application Background

In continuous chemical production processes, temperature and pressure rarely remain constant. Frequent fluctuations, aggressive chemical media, and the need for long-term data accuracy pose significant measurement challenges.

In such environments, instrumentation must not only be corrosion-resistant but also exhibit signal stability in the face of dynamic temperature and pressure changes. VEGA’s technology approach emphasizes reliability, long-term stability, and robust design.

Challenges

• Rapidly varying temperature and pressure
• Corrosive process media
• Long maintenance intervals required
• Minimized measurement drift for reliable control

VEGA Measurement Strategy

• Temperature and pressure compensation to maintain stable readings
• Corrosion-resistant materials: Alloy C22, titanium, PTFE/PFA coatings
• Self-diagnostics to detect drift or performance issues
• Radar and ceramic measurement technologies for long-term stability

Engineering Benefits

• Reliable long-term process data
• Consistent performance despite fluctuations
• Reduced maintenance and extended instrument life
• Enhanced process safety and predictability

This case illustrates that temperature measurement in chemical processing depends on integrated strategies rather than standalone sensors.

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Engineering Insights and Takeaways

• Structural adaptation and non-invasive solutions improve measurement reliability in harsh environments.
• Dynamic condition compensation enhances long-term stability.
• Sensor installations must consider not just the variable measured but the mechanical, fluid dynamic, and chemical environment.

Industrial temperature measurement is about creating a robust, reliable solution that integrates measurement principle, protective structure, and process-adaptive design.

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For detailed technical specifications, application advice, or commercial inquiries regarding a wider range of industry brands, please contact us via WhatsApp: +86 132 7933 7527 or Email: info@antletstech.com. Our experienced engineering team is ready to support your project.