Micropilot M FMR62

Summary

Product Identification

The Endress+Hauser Micropilot FMR62 is a free space radar level measuring instrument.

Application

• Continuous, non-contact level measurement of liquids, pastes, and sludges.
• Features an integrated PEEK antenna or a PTFE-plated, flush-mounted antenna.
• Suitable for vessels with internal fittings due to improved focusing and a small beam angle.
• Compact design allows installation in small vessels and with small process connections.

Operating Limits

• Maximum measuring range: 80 m (262 ft)
• Temperature range: –40 to +200 °C (–40 to +392 °F)
• Pressure range: –1 to +25 bar (–14.5 to +362.6 psi)

Performance Characteristics

• Accuracy: ± 1 mm (0.04 in)
• Reference accuracy:
  • Measuring distance up to 0.8 m (2.62 ft): max. ±4 mm (±0.16 in) or ±0.03 % (analog output)
  • Measuring distance > 0.8 m (2.62 ft): ±1 mm (±0.04 in) or ±0.02 % (analog output)
• Non-repeatability: ≤ 1 mm (0.04 in)
• Measured value resolution:
  • Digital: 1 mm
  • Analog: 1 µA
• Response time: < 3.6 s (when damping is switched off)
• Influence of ambient temperature:
  • Digital (HART): average TC = 2 mm/10 K
  • Analog (current output):
    • Zero point (4 mA): average TC = 0.02 %/10 K
    • Span (20 mA): average TC = 0.05 %/10 K

Feed Water / Medium Properties

• Dielectric constant (εr): Can range from 1.2 upwards.
  • A0: 1.2 to 1.4
  • A: 1.4 to 1.9
  • B: 1.9 to 4
  • C: 4 to 10
  • D: > 10
• Media with absorbing gas phase: Measurement of media such as Ammonia, Acetone, Methylene chloride, etc., requires specialized devices. Contact Endress+Hauser for these applications.
• Minimum level for low dielectric constants: See official PDF for exact tabulated values.

Product Water / Output

• Output Signal: HART (FSK ±0.5 mA over current signal, 1200 Bit/s, galvanically isolated)
• Switch output (optional for HART devices): Open collector, binary switching, failure mode non-conductive.
  • Electrical connection data: U = 16 to 35 VDC, I = 0 to 40 mA
  • Internal resistor: RI < 880 Ω
• Signal on alarm: Configurable current output (3.6 mA minimum alarm, 22 mA maximum alarm factory setting) or status signal via local display and operating tool.
• Linearization: Supports conversion to volume/mass with preprogrammed or manually entered tables (up to 32 value pairs).
• Galvanic isolation: All output circuits are galvanically isolated.

Operating Frequency

• Approx. 80 GHz.
• Up to 8 devices can be installed in a tank without mutual influence.

Transmission Power

• Peak power: 6.3 mW
• Average output power: 63 µW

Power Supply

• External power supply required.
• Supply voltage (2-wire, 4-20 mA HART, passive):
  • Non-Ex, Ex ec, Ex ic, CSA GP: 14 to 35 V
  • Ex ia / IS: 14 to 30 V
  • Ex db(ia) / XP, Ex ic(ia), Ex ec(ia), Ex ta / DIP: 14 to 35 V
  • Ex ia + Ex db(ia) / IS + XP: 14 to 30 V
• Supply voltage (with switch output or 4-20 mA output): 16 to 35 V (depending on approval).
• Note: If the Bluetooth module is used, the minimum supply voltage increases by 2 V.
• 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
• Current consumption: 3.6 to 22 mA (nominal), adjustable breakdown signal from 3.59 to 22.5 mA.
• Power supply failure: Configuration is retained in HistoROM.

Electrical

• HART Communication: Minimum operating voltage 17.5 V, start-up current 4 mA, HART load min. 250 Ω.
• Cable entries: M20x1.5, ½" NPT, G ½", M12 plug, or 7/8" plug (depending on version and approvals).
• Cable specification:
  • Pluggable spring-force terminals (without overvoltage protection): 0.5 to 2.5 mm².
  • Screw terminals (with overvoltage protection): 0.2 to 2.5 mm².
  • Shielded cable recommended for HART protocol.
• Overvoltage protection: Integrated or external modules available. Threshold DC voltage 400 to 700 V.

Mechanical / Hydraulic

• Antenna options:
  • Integrated PEEK (20 mm / 3/4" or 40 mm / 1-1/2")
  • PTFE-cladded, flush-mounted (50 mm / 2" or 80 mm / 3")
• Housing materials: Stainless steel (GT18), Plastic (GT19), Die-cast aluminum (GT20).
• Dimensions: See official PDF for exact tabulated values.
• Weight: See official PDF for exact tabulated values.
• Process connection: Threaded or flange connections.

Installation

• General: Recommended distance from wall to nozzle outer edge is ~1/6 of vessel diameter, minimum 15 cm (5.91 in). Avoid mounting in the center or above the filling curtain. A weather protection cover is recommended.
• Internal vessel fittings: Avoid placement within the signal beam.
• Interference echo suppression: Utilize metal deflector plates or the device's mapping function.
• Beam angle: Varies with antenna size (e.g., 3° for 80 mm antenna, 14° for 20 mm antenna).
• Measurement through ball valve: Permitted through open full bore ball valves if gaps do not exceed 1 mm (0.04 in).
• Measurement through plastic cover/dielectric windows: Suitable for media with εr ≥ 10. Optimum thickness depends on window material.
• Free-space installation: Antenna axis must be perpendicular to the product surface. Maximum nozzle length varies by antenna type and nozzle diameter.
• Flush mount installation: Antenna axis must be perpendicular to the product surface. Maximum nozzle length varies by antenna type and nozzle diameter. Torque values for flange mounting are provided.
• Stilling well installation: Recommended for metal wells with constant diameter, minimal difference between antenna and well diameter, and smooth interior. Slot width or hole diameter max. 1/10 of pipe diameter.
• Bypass installation: Similar recommendations to stilling wells, using metal bypass piping with constant diameter.

Environment

• Ambient temperature range: –40 to +200 °C (–40 to +392 °F) (depending on housing and process conditions).
• Storage temperature: –40 to +80 °C (–40 to +176 °F).
• Degree of protection: IP66/IP67/IP69K (depending on housing and cable gland).
• Vibration resistance: See official PDF for exact tabulated values.
• Electromagnetic compatibility (EMC): See official PDF for exact tabulated values.

Certificates and Approvals

Includes CE mark, RoHS, RCM-Tick, various Ex approvals (ATEX, IECEx, FM, CSA), SIL2/SIL3, WHG, NACE MR 0175/ISO 15156, Marine approval, and radio standards.

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