Technical Characteristics and Chemical Resilience
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PTFE-Filled Flush Antenna: For applications involving highly corrosive or aggressive media, the FMR62 features a completely PTFE-filled, flush-mounted horn antenna. This design ensures that no metal parts are exposed to the process, maximizing system availability and sensor lifespan in harsh chemical environments.
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High Beam Focusing: The 80 GHz frequency produces a narrow beam angle that allows the sensor to navigate around internal vessel fittings such as heating coils, agitators, and baffles. This precision ensures a stable signal even in complex tank geometries.
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Compact PEEK Antenna: The integrated PEEK antenna design allows the FMR62 to be used with very small process connections (e.g., 1.5″ threads), making it a versatile choice for skids and smaller vessels where space is limited.
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Heartbeat Technology: This integrated suite provides continuous self-diagnostics and on-demand verification. It can detect process-related issues like antenna buildup or foam formation, allowing for predictive maintenance without process interruption.
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Safety by Design: Developed for SIL3 applications (in homogeneous redundancy), the FMR62 simplifies safety management with the world’s easiest proof test concept for SIL and WHG, significantly reducing operational downtime and engineering effort.
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Multi-Echo Tracking: Enhanced algorithms allow the device to accurately identify and track the liquid level with ±1 mm precision, regardless of changing media, temperature layers, or vapors within the tank.
Technical Specification Matrix
| Feature | Technical Details |
| Measuring Principle | Free-space Radar (W-band) |
| Frequency | 80 GHz |
| Measuring Range | Up to 80 m (262 ft) |
| Accuracy | ±1 mm (0.04 in) |
| Process Temperature | -40 to +200 °C (-40 to +392 °F) |
| Process Pressure | -1 to +25 bar (-14.5 to +362.6 psi) |
| Output Signal | 4-20 mA HART |
| Safety & Compliance | SIL 2/3, WHG, ATEX, IECEx, Marine |
Primary Applications
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Corrosive Liquid Storage: Level measurement in tanks containing acids, bases, or other aggressive chemicals where PTFE protection is required.
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Tall Storage Silos: High-accuracy measurement in large liquid storage tanks up to 80 meters tall.
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Process Vessels with Agitators: Reliable tracking in turbulent mixing tanks where the narrow beam must bypass moving internal components.
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Small Skids and Containers: Utilizing the PEEK antenna for high-performance measurement in vessels with very small mounting nozzles.
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Safety-Instrumented Systems (SIS): Ideal for use as high-level or overfill protection in safety loops requiring SIL-rated instrumentation.
