Technical Characteristics and System Intelligence
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Multi-Sensor Management: A single FMU95 can monitor up to 10 measurement points simultaneously. This is particularly useful for measuring different silos or calculating the average level in very large vessels where a single sensor might not provide an accurate profile.
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Advanced Calculation Functions: The transmitter can be programmed to calculate average values, sums, or differences between sensors. For example, in a large grain terminal, it can sum the total volume across several silos or average the level across a large stockpile.
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Sophisticated Diagnostic Display: The unit features a large 6-line plain text display that supports 15 languages. It allows for detailed visualization of envelope curves, which is critical for suppressing false echoes in complex industrial environments.
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Seamless Digital Integration: With PROFIBUS DP support, the FMU95 can transmit up to 20 measured values back to the PLC or DCS, providing comprehensive data on level, temperature, and device status over a single digital bus.
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Intelligent Temperature Correction: Accuracy is maintained through Time-of-Flight correction, utilizing either the integrated temperature sensors in the FDU heads or external sensors for even higher precision in environments with extreme gradients.
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FieldCare Compatibility: The device is fully supported by the FieldCare operating program, which simplifies commissioning, detailed echo analysis, and the documentation of each measuring point.
Technical Specification Matrix
| Feature | Technical Details |
| Measuring Principle | Ultrasonic (Time-of-Flight) |
| Number of Channels | Up to 5 or 10 sensors (FDU90/91/92/93/95) |
| Max. Measuring Range | Up to 45 m (148 ft) (Depending on sensor) |
| Mounting Options | Field housing (IP66) or Top-hat rail (IP20) |
| Display | 6-line plain text with envelope curve visualization |
| Communication | 4…20mA HART, PROFIBUS DP |
| Linearization | Up to 32 points per channel |
Primary Applications
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Multiple Silo Monitoring: Centralized level measurement for groups of small to medium-sized silos in the food or chemical industry.
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Large Stockpiles: Using multiple sensors to calculate the average height and total volume of ore, coal, or woodchip piles.
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Wastewater Treatment Hubs: Monitoring several pump stations or settling tanks from a single control cabinet located in a safe zone.
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Differential Level Measurement: Calculating the level difference before and after mechanical rakes or screens in water intake channels to detect clogs.
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Inventory Management: Summing the volumes of multiple liquid storage tanks to provide a “total plant inventory” value.
