Micropilot M FMR51

Summary

Product identification

Micropilot FMR51, FMR52 - Free space radar level sensor.

Application

• Continuous, non-contact level measurement of liquids, pastes, and slurries.
• FMR51 features a horn antenna.
• FMR52 features a flush-mounted, completely filled PTFE horn antenna.

Operating limits

• Maximum measuring range: 70 m (230 ft)
• Process temperature: –196 to +450 °C (–321 to +842 °F)
• Process pressure: –1 to +160 bar (–14.5 to +2 320 psi)
• Accuracy: ± 2 mm

Feed water (Process conditions)

The usable measuring range depends on:

• Antenna size
• Medium's reflective properties
• Installation position
• Possible interference reflections

Media groups:

• Group A: εr 1.4 to 1.9 (e.g., non-conductive liquids, liquid gas, ammonia gas)
• Group B: εr 1.9 to 4 (e.g., non-conductive liquids, gasoline, oil, toluene)
• Group C: εr 4 to 10 (e.g., concentrated acid, organic solvents, alcohol, acetone)
• Group D: εr > 10 (e.g., conductive liquids, aqueous solutions, diluted acids and bases)

Product water (Output)

• Output signal: HART (FSK ±0.5 mA over current signal, 1200 Bit/s, galvanic isolation)
• Bluetooth® wireless technology: Via SmartBlue app (range > 10 m, encrypted)
• PROFIBUS PA: Manchester Bus Powered (MBP), 31.25 kBit/s, voltage mode, galvanic isolation
• FOUNDATION Fieldbus: Manchester Bus Powered (MBP), 31.25 kBit/s, voltage mode, galvanic isolation
• Switch output: Available for HART devices (Open collector, binary switching, failure mode: non-conductive). Electrical connection data: U = 16 to 35 VDC, I = 0 to 40 mA.

Signal on alarm:

• Current output: Adjustable failure mode (3.6 mA minimum alarm, 22 mA maximum alarm, or 3.59 to 22.5 mA configurable).
• Local display/Remote operation: Status signal (NAMUR NE 107), plain text display.

Linearization:

• Up to 32 points, can be entered manually or semi-automatically.
• Preprogrammed linearization tables for cylindrical vessels.

Electrical

Power supply:

• 2-wire, 4-20mA HART, passive: Terminal voltage 10.4 to 35 VDC (Non-Ex, Ex nA, Ex ic, CSA GP) or 10.4 to 30 VDC (Ex ia/IS), 13 to 35 VDC (Ex d(ia)/XP, Ex ic(ia), Ex nA(ia), Ex ta/DIP), 13 to 30 VDC (Ex ia + Ex d(ia)/IS + XP). Minimum supply voltage increases by 3 V if Bluetooth is used.
• 2-wire, 4-20mA HART, switch output: Terminal voltage 13 to 35 VDC (Non-Ex, Ex variants) or 13 to 30 VDC (Ex ia variants).
• 2-wire, 4-20mA HART, 4-20mA: Terminal voltage 13 to 28 VDC.
• 4-wire, 4-20mA HART, active: 90 to 253 VAC (50 to 60 Hz) or 10.4 to 48 VDC.
• PROFIBUS PA, FOUNDATION Fieldbus: 9 to 32 VDC (Non-Ex, Ex variants) or 9 to 30 VDC (Ex ia variants).

Power consumption:

• 2-wire (4-20mA HART): < 0.9 W
• 2-wire (4-20mA HART, switch output): < 0.9 W
• 2-wire (4-20mA HART, 4-20mA): < 2 x 0.7 W
• 4-wire (90-253VAC): 6 VA
• 4-wire (10.4-48VDC): 1.3 W

Current consumption:

• HART: 3.6 to 22 mA (nominal)
• PROFIBUS PA: 14 mA (nominal)
• FOUNDATION Fieldbus: 15 mA (device basic current)

Mechanical / hydraulic

• Dimensions: See official PDF for exact dimensions.
• Weight: See official PDF for exact weight.
• Materials: Various options for housing (stainless steel, plastic, aluminum), antenna, and process connection. See official PDF for specific material details.
• Cable entries: M20x1.5, ½" NPT, G ½", M12 plug, 7/8" plug.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror