Micropilot M FMR53

Summary

Product identification

Micropilot FMR53, FMR54 is a free-space radar level sensor for continuous, non-contact measurement of liquids, pastes, and sludges.

• FMR53: Rod antenna
• FMR54: Horn or planar antenna

Operating limits

• Maximum measuring range: 20 m (66 ft); For FMR54 with planar antenna in a stilling well: 38 m (125 ft)
• Process temperature: –196 to +400 °C (–321 to +752 °F)
• Process pressure: –1 to +160 bar (–14.5 to +2,320 psi)
• Accuracy: ± 6 mm

Feed water

The usable measuring range depends on antenna size, medium reflectivity, installation, and interference. Media are grouped by dielectric constant (εr):

• Group A: 1.4 to 1.9 (e.g., liquid gas)
• Group B: 1.9 to 4 (e.g., gasoline, oil)
• Group C: 4 to 10 (e.g., concentrated acid, alcohol)
• Group D: > 10 (e.g., conductive liquids)

Product water

Not applicable for this device.

Electrical

Output Signal

• HART:
  • FSK ±0.5 mA over current signal
  • Data transmission rate: 1,200 Bit/s
  • Galvanic isolation: Yes
• Bluetooth® wireless technology:
  • Requires accessory 610 "Accessory mounted", option NF "Bluetooth"
  • Operation via SmartBlue app (iOS/Android)
  • Range under reference conditions: > 10 m (33 ft)
  • Encrypted communication and password protection
• PROFIBUS PA:
  • Signal coding: Manchester Bus Powered (MBP)
  • Data transmission rate: 31.25 kBit/s, Voltage mode
  • Galvanic isolation: Yes
• FOUNDATION Fieldbus:
  • Signal coding: Manchester Bus Powered (MBP)
  • Data transmission rate: 31.25 kBit/s, Voltage mode
  • Galvanic isolation: Yes
• Switch output (Optional for HART devices):
  • Type: Open collector
  • Switching behavior: Binary (conductive/non-conductive)
  • Failure mode: Non-conductive
  • Electrical data: U = 16 to 35 VDC, I = 0 to 40 mA
  • Internal resistance: Rᵢ < 880 Ω
  • Insulation voltages: Floating, 1350 VDC (supply), 500 VAC (ground)
  • Switch point: User-programmable
  • Switching delay: User-programmable (0 to 100 s)

Signal on Alarm

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

Linearization

Supports linearization tables with up to 32 points for converting measurements to engineering units (volume, mass) for various vessel shapes.

Galvanic Isolation

All output circuits are galvanically isolated from each other.

Protocol-specific Data

• HART: Manufacturer ID 17, Device type ID 0x1128, HART specification 7.0. Device Description files available online. Minimum load 250 Ω.
• PROFIBUS PA: Manufacturer ID 17, Ident number 0x1559, Profile version 3.02. GSD file available online.
• FOUNDATION Fieldbus: Manufacturer ID 0x452B48, Device type 0x1028, Device revision 0x01. DD/CFF/ITK information available online.

Power Supply

• 2-wire, 4-20mA HART, passive:
  • Terminal voltage: 10.4 to 35 V (non-Ex) or 13 to 35 V (Ex)
  • Maximum load: Varies with supply voltage (e.g., 500 Ω at 24 V supply)
• 4-wire, 4-20mA HART, active:
  • Supply voltage: 90 to 253 VAC or 10.4 to 48 VDC
  • Maximum load: 500 Ω
• PROFIBUS PA / FOUNDATION Fieldbus:
  • Terminal voltage: 9 to 32 V (non-Ex) or 9 to 30 V (Ex)
  • FISCO/FNICO compliant
• Minimum supply voltage: May increase by 3 V if the Bluetooth module is used.

Power Consumption

• 2-wire (HART/HART+Switch/HART+4-20mA): < 0.9 W or < 2 x 0.7 W
• 4-wire (VAC/VDC): 6 VA or 1.3 W
• PROFIBUS PA / FOUNDATION Fieldbus: Basic current 14 mA (PROFIBUS PA) or 15 mA (FOUNDATION Fieldbus).

Current Consumption

• HART: 3.6 to 22 mA (nominal). Adjustable breakdown signal (3.59 to 22.5 mA).
• PROFIBUS PA: 14 mA (nominal). 0 mA (failure).
• FOUNDATION Fieldbus: 15 mA (device basic). 0 mA (failure).

Power Supply Failure

Configuration is retained in HistoROM (EEPROM). Error messages are stored.

Terminals

• Without integrated overvoltage protection: Plug-in spring terminals (0.5 to 2.5 mm²).
• With integrated overvoltage protection: Screw terminals (0.2 to 2.5 mm²).

Cable entries

Various options including M20x1.5, ½" NPT, G ½", M12 plug, and 7/8" plug depending on approval and housing material.

Cable specification

• HART: Shielded cable recommended.
• PROFIBUS: Twisted, screened two-wire cable recommended.
• FOUNDATION Fieldbus: Twisted, shielded two-wire cables recommended.

Overvoltage Protection

An integrated overvoltage protection module is available as an option (Feature 610, option NA).

Mechanical / Hydraulic

Dimensions

Dimensions are detailed in the official PDF.

Weight

Weight details are available in the official PDF.

Materials

• Housing: Available in stainless steel (GT18), plastic (GT19), or die-cast aluminum (GT20).
• Antenna and process connection: Materials vary and are detailed in the official PDF.
• Weather protection cover: Materials are detailed in the official PDF.

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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