Technical Characteristics and Design
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Extreme Temperature and Pressure: The FMR62B is built for the “heavy-duty” category. Its mechanical design allows for operation in conditions as low as -196 °C and as high as +450 °C, ensuring reliability in everything from LNG storage to high-temperature chemical reactors.
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Unmatched 80m Range and Precision: By combining a long-range capability of 80 meters with an accuracy of ±1 mm, this sensor is ideal for tall inventory tanks. The 80 GHz signal remains focused over long distances, minimizing signal loss and interference.
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Advanced Safety and SIL Management: Developed according to IEC 61508, the FMR62B is designed for SIL 2 and SIL 3 applications. It features unique guided wizards for SIL-locking and proof testing, which significantly reduces the risk of human error during safety-critical configurations.
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Heartbeat Technology: This suite provides a “pulse check” of the process and the instrument. It offers continuous monitoring and can identify anomalies such as foam formation or antenna buildup in real-time. The on-demand verification feature creates a documented report for regulatory compliance without interrupting the process.
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Intuitive Troubleshooting: The local display doesn’t just show error codes; it provides clear, text-based recommended actions. This “easy handling” philosophy speeds up maintenance and reduces the need for extensive technical manuals on-site.
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High Beam Focusing: Even in vessels filled with internal heating coils, agitators, or baffles, the narrow beam of the 80 GHz signal navigates through obstacles to find the true liquid surface, ensuring a stable measurement in turbulent conditions.
Technical Specification Matrix
| Feature | Technical Details |
| Measuring Principle | Free-space Radar (W-band) |
| Frequency | 80 GHz |
| Measuring Range | Up to 80 m (262.5 ft) |
| Accuracy | ±1 mm (0.04 in) |
| Process Temperature | -196 to +450 °C (-320 to +842 °F) |
| Process Pressure | -1 to +160 bar (-14.5 to +2,320.6 psi) |
| Communication | 4-20 mA HART, Bluetooth, PROFIBUS PA, PROFINET |
| Safety & Compliance | SIL 2/3, WHG, ATEX, IECEx, Marine, 5/10-pt Calibration |
Primary Applications
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High-Pressure Chemical Reactors: Monitoring levels in vessels where changing media and extreme pressures are common.
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Cryogenic Storage: Precise measurement of liquefied gases (LNG, Nitrogen, Oxygen) at temperatures down to -196 °C.
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Tall Inventory Tanks: Tracking high-value liquids in large-scale storage terminals where 80-meter range and 1mm accuracy are required.
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Aggressive Media Handling: Suitable for acids and bases using specialized antenna materials and high-integrity process seals.
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Power Plant Utilities: Level monitoring in high-temperature condensate tanks and boiler feed water systems.
