Micropilot M FMR50

Summary

Product Identification

The Endress+Hauser Micropilot FMR50 is a non-contact free-space radar level measurement instrument.

Application

• Continuous, non-contact level measurement of liquids, pastes, and slurries.
• Features an encapsulated PVDF or PP cladded horn antenna.
• Designed for use in various applications including storage vessels, buffer vessels, vessels with agitators, and stilling wells.

Operating Limits

• Maximum measuring range: 40 m (131 ft)
• Process temperature: –40 to +130 °C (–40 to +266 °F)
• Process pressure: –1 to +3 bar (–14.5 to +43.5 psi)

Performance Characteristics

• Accuracy: ± 2 mm

Input

• Measured Variable: Distance from the reference point to the product surface.
• Calculation: Level is calculated based on the empty distance ("E") and the measured distance ("D"). L = E - D.
• Linearization: Optionally, level can be converted to volume or mass using a linearization function with up to 32 points. Preprogrammed linearization tables are available for cylindrical and horizontal cylindrical vessels.

Measuring Range

The usable measuring range depends on antenna size, medium reflectivity, installation, and interference. The document provides detailed tables for various media groups (A, B, C, D based on dielectric constant εr), antenna sizes (40 mm, 80 mm, 100 mm), and conditions (calm surface, moving surface, turbulent surface, stilling well).

• Standard version: Up to 30 m (98 ft)
• With "Advanced dynamics" application package: Up to 40 m (131 ft)

Output

The Micropilot FMR50 supports multiple output protocols:

• HART:
  • Signal coding: FSK ±0.5 mA over current signal
  • Data transmission rate: 1200 Bit/s
  • Galvanic isolation: Yes
• Bluetooth® wireless technology:
  • Requires order code 610, option NF.
  • Operation via SmartBlue app (iOS/Android).
  • Range under reference conditions: > 10 m (33 ft).
  • Encrypted communication.
• 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 switch output.
  • Switching behavior: Binary, triggered by programmable switch-on/switch-off points.
  • Failure mode: Non-conductive.
  • Electrical connection data: U = 16 to 35 VDC, I = 0 to 40 mA.
  • Internal resistance: Rᵢ < 880 Ω.
  • Insulation voltages: Floating, 1350 VDC (power supply), 500 VAC (ground).

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: Status signal (NAMUR NE 107) and plain text display.
• Remote operation (HART, PROFIBUS PA, FOUNDATION Fieldbus): Status signal (NAMUR NE 107) and plain text display.

Power Supply

• 2-wire, 4-20 mA HART, passive:
  • Terminal voltage: 10.4 to 35 VDC (Non-Ex).
  • Maximum load R depends on supply voltage U₀.
• 4-wire, 4-20 mA HART, active:
  • 90 to 253 VAC (50 to 60 Hz).
  • 500 Ω maximum load.
  • 10.4 to 48 VDC.
• PROFIBUS PA, FOUNDATION Fieldbus:
  • 9 to 32 VDC (Non-Ex).
  • 9 to 30 VDC (Ex ia/IS).
  • FISCO/FNICO compliant.

Power Consumption

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

Current Consumption

• HART: Nominal 3.6 to 22 mA. Adjustable breakdown signal (3.59 to 22.5 mA).
• PROFIBUS PA: Nominal 14 mA. Failure current: 0 mA.
• FOUNDATION Fieldbus: Device basic current 15 mA. Failure current: 0 mA.

Mechanical Construction

• Antenna: Encapsulated PVDF or PP cladded horn antenna.
• Housing Materials: GT19 (plastic) or GT20 (die-cast aluminum, powder-coated).
• Weight: Not specified in the extract.
• Dimensions: Refer to specific product drawings in the PDF.

Electrical Connection

• Terminals: Plug-in spring terminals or screw terminals depending on overvoltage protection. Wire cross-sections 0.2 to 2.5 mm² (24 to 14 AWG).
• Cable entries: M20x1.5, ½" NPT, G ½", M12 plug, 7/8" plug depending on version and approvals.
• Cable specification: Shielded cable recommended for HART. Twisted, screened two-wire cable for PROFIBUS and FOUNDATION Fieldbus.

Environment

• Temperature range (Ambient): Not explicitly detailed but implied by supply voltage requirements at low temperatures. Storage temperature also not detailed.
• Degree of protection: Not specified in the extract.
• Vibration resistance: Not specified in the extract.
• Electromagnetic compatibility (EMC): Meets relevant standards.

Certifications and Approvals

Includes CE mark, RoHS, RCM-Tick, various Ex approvals (ATEX, IECEx, etc.), WHG, SIL2/SIL3, CSA, and others. Specific details are listed in the Certificates and Approvals section.

Disclaimer

This summary is extracted from a datasheet and may not include all figures, footnotes, or revisions. Contractual data must be verified against the specific revision of the OEM PDF used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror