Liquiphant FTL62

Summary

Product identification

• Product Name: Liquiphant FTL62
• Product Type: Point level switch with highly corrosion-resistant coating for liquids.

Application

• Point level switch for all liquids, for minimum or maximum detection in tanks, vessels, and piping, even in hazardous areas.
• Suitable for aggressive media due to various corrosion-resistant coatings, plastics, or enamel.
• Functions reliably regardless of flow, turbulence, air bubbles, foam, vibration, solids content, or buildup.
• Approved for safety systems with functional safety requirements up to SIL2/SIL3 in accordance with IEC 61508.
• No calibration needed.

Operating limits

• Process Temperature Range: –50 to +150 °C (–58 to +302 °F)
• Process Pressure Range: Up to 40 bar (580 psi)
• Viscosity: Up to 10,000 mPa⋅s

Feed water

• Measured Variable: Level (point level), MAX or MIN safety.
• Sensor Length:
  • With plastic coating: maximum 3 m (9.8 ft)
  • With enamel coating: maximum 1.2 m (3.9 ft)

Output and Input Variants

The Liquiphant FTL62 is available with several electronic inserts:

• 2-wire AC (FEL61): Switches load directly into the power supply circuit.
  • Supply Voltage: 19 to 253 VAC, 50 Hz/60 Hz
• 3-wire DC-PNP (FEL62): Switches load via transistor (PNP), suitable for PLCs.
  • Supply Voltage: 10 to 55 VDC
  • Low-temperature option: –60 °C (–76 °F)
• Universal current connection, relay output (FEL64): Switches loads via 2 potential-free change-over contacts.
  • Supply Voltage: 19 to 253 VAC / 19 to 55 VDC
  • Low-temperature option: –60 °C (–76 °F)
• DC connection, relay output (FEL64DC): Switches loads via 2 potential-free change-over contacts.
  • Supply Voltage: 9 to 20 VDC
  • Low-temperature option: –60 °C (–76 °F)
• PFM output (FEL67): For connection to Nivotester switching units.
  • Supply Voltage: 9.5 to 12.5 VDC
  • Low-temperature option: –50 °C (–58 °F)
• 2-wire NAMUR > 2.2 mA/ < 1.0 mA (FEL68): For connection to isolating amplifiers according to NAMUR.
  • Supply Voltage: 8.2 VDC ±20%
  • Low-temperature option: –50 °C (–58 °F)

Output signal

• Switching Delay Times: Configurable (0.5s/1.0s, 0.25s/0.25s, 1.5s/1.5s, 5.0s/5.0s) for covering/uncovering.
• COM Interface: For connecting optional modules VU120 or VU121.
• Bluetooth® wireless technology (optional): For reading device and diagnostic data via the "SmartBlue" app.

Performance characteristics

• Reference Operating Conditions: Defined ambient and process temperature, density, viscosity, pressure, and installation.
• Maximum Measured Error:
  • Plastic coating: –0.2 to –1.2 mm
  • Enamel coating: 0 to 0.9 mm
• Hysteresis:
  • Plastic coating: 2.5 mm
  • Enamel coating: 3.5 mm
• Non-repeatability: 0.5 mm
• Influence of Process Temperature: Switch point shift varies with temperature and coating type (ECTFE, PFA, Enamel).
• Influence of Process Pressure: Switch point shift varies with pressure and coating type (ECTFE, PFA, Enamel).
• Influence of Process Medium Density: Switch point deviation is specified for different density settings and coating types.

Mounting

• Mounting Location/Orientation: Any orientation for pipes up to 500 mm; vertical from above for long pipes. Minimum distance of 10 mm from tank/pipe wall to tuning fork.
• Viscosity Considerations:
  • Low viscosity (< 2,000 mPa⋅s): Tuning fork can be positioned within installation socket.
  • High viscosity (≤ 10,000 mPa⋅s): Tuning fork must be located outside the installation socket.
• Installation in Piping: Flow velocity up to 5 m/s possible under certain conditions.
• Cable Entry Alignment: Housing can be rotated.
• Special Instructions: Vessel insulation may be required for high process temperatures; support may be needed for pipes/sensors longer than 1,600 mm or under severe dynamic load.

Environment

• Ambient Temperature Range: –40 to +70 °C (–40 to +158 °F).
  • Optional: –50 °C (–58 °F) or –60 °C (–76 °F) with restricted operating life/performance.
  • Plastic housing minimum: –20 °C (–4 °F).
• Storage Temperature: Not explicitly stated in extract.
• Humidity: Not explicitly stated in extract.
• Operating Altitude: Not explicitly stated in extract.
• Climate Class: Not explicitly stated in extract.
• Degree of Protection: Not explicitly stated in extract.
• Vibration Resistance: Not explicitly stated in extract.
• Shock Resistance: Not explicitly stated in extract.
• Mechanical Load: Not explicitly stated in extract.
• Pollution Degree: Not explicitly stated in extract.
• Electromagnetic Compatibility (EMC): Not explicitly stated in extract.

Mechanical Construction

• Dimensions: Refer to specific product diagrams in the datasheet.
• Coating Material and Layer Thickness: Specific details are available in the datasheet.
• Weight: Not explicitly stated in extract.
• Materials: Various materials are used; specific details are available in the datasheet.

User Interface

• Operation Concept: Onsite and remote operation supported.
• Onsite Operation: Local display may be available.
• Remote Operation: Possible via interfaces.

Certificates and Approvals

• CE mark
• RCM marking
• Ex approval (details in separate Ex documentation)
• Overfill protection
• Functional safety (SIL2/SIL3)
• Marine approvals
• Radio approval
• CRN approval
• Test, certificate, declaration
• Pressure Equipment Directive
• Process seal as per ANSI/ISA 12.27.01
• China RoHS symbol
• RoHS
• EAC conformity
• ASME B 31.3/31.1

Accessories

• Test magnet
• Protective covers
• M12 socket
• Bluetooth module VU121 (optional)
• LED module VU120 (optional)

Documentation

• Standard documentation
• Supplementary device-dependent documentation

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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