Liquiphant FTL64

Summary

Product identification

• Product: Liquiphant FTL64
• Type: Vibronic point level switch
• Document: TI01540F/00/EN/04.23-00
• Version: 2023-09-30

Application

Point level switch for all liquids, for minimum or maximum detection in tanks, vessels, and piping, suitable for hazardous areas.

• High-temperature applications up to 280 °C (536 °F).
• Tuning fork and process connection available in highly corrosion-resistant Alloy C22 (2.4602) or PFA-coated (conductive) for aggressive media.
• Reliable function unaffected by flow, turbulence, air bubbles, foam, vibration, solids content, or buildup.
• Approved for safety systems up to SIL2/SIL3 in accordance with IEC 61010-1.

Operating limits

• Process temperature range: –60 to +280 °C (–76 to +536 °F)
• Pressure range: Up to 100 bar (1 450 psi)
• Viscosity: Up to 10,000 mPa⋅s

Performance characteristics

• Reference conditions: Ambient temperature +23 °C (+73 °F), process temperature +23 °C (±5 °C), water density 1 g/cm³, viscosity 1 mPa⋅s, unpressurized.
• Maximum measured error: ±1 mm (0.04 in) at switch point.
• Hysteresis: Typically 2.5 mm (0.1 in).
• Non-repeatability: 0.5 mm (0.02 in).
• Switch point movement (process temperature): +1.4 to –5.5 mm (+0.06 to –0.22 in) from –60 to +280 °C (–76 to +536 °F).
• Switch point movement (process pressure): 0 to –3.9 mm (0 to –0.15 in) from –1 to +100 bar (–14.5 to +1 450 psi).

Input

• Measured variable: Level (point level), MAX or MIN safety.
• Measuring range: Depends on installation location and ordered pipe extension. Standard pipe extension up to 3 m (9.8 ft); up to 6 m (20 ft) on request.

Output and Electronic Inserts

Various electronic inserts are available, offering different output signals and operational characteristics:

• 2-wire AC (FEL61): Switches load directly into power supply circuit.
  • Supply voltage: 19 to 253 VAC, 50 Hz/60 Hz.
  • Power consumption: ≤ 2 VA.
  • Current consumption: ≤ 3.8 mA (residual current when blocked).
• 3-wire DC-PNP (FEL62): Switches load via transistor (PNP) to separate connection.
  • Supply voltage: 10 to 55 VDC (Class 2 or SELV).
  • Power consumption: ≤ 0.5 W.
  • Current consumption: ≤ 10 mA (without load).
  • Load current: ≤ 350 mA.
• Universal current connection, relay output (FEL64): Switches loads via 2 floating change-over contacts.
  • Supply voltage: 19 to 253 VAC, 50 Hz/60 Hz or 19 to 55 VDC.
  • Power consumption: < 25 VA, < 1.3 W.
  • Connectable load: AC ≤ 6 A, AC ≤ 253 V; DC ≤ 6 A to 30 V, DC ≤ 0.2 A to 125 V.
• DC connection, relay output (FEL64DC): Switches loads via 2 potential-free change-over contacts.
  • Supply voltage: 9 to 20 VDC (Class 2 or SELV).
  • Power consumption: < 1.0 W.
  • Connectable load: AC ≤ 6 A, AC ≤ 253 V; DC ≤ 6 A to 30 V, DC ≤ 0.2 A to 125 V.
• PFM output (FEL67): For connection to Nivotester switching units (FTL325P, FTL375P).
  • Supply voltage: 9.5 to 12.5 VDC (Class 2 or SELV).
  • Power consumption: ≤ 150 mW.
  • Output signal: Pulse Frequency Modulation (PFM).
• 2-wire NAMUR > 2.2 mA/< 1.0 mA (FEL68): For connection to isolating amplifiers according to NAMUR (IEC 60947-5-6).
  • Supply voltage: 8.2 VDC ±20 % (Class 2 or SELV).
  • Power consumption: < 6 mW to < 38 mW.
  • Output signal: 2.2 to 3.8 mA (OK status) or 0.4 to 1.0 mA (demand/alarm).

Switching delay times: Options include 0.5s/1.0s, 0.25s/0.25s, 1.5s/1.5s, or 5.0s/5.0s for covered/uncovered states.

COM interface: For connecting optional modules VU120 (LED) or VU121 (Bluetooth).

Bluetooth® wireless technology (optional): Enables data readout via the SmartBlue app. Suitable for hazardous areas when ordered with specific accessories.

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 and performance. Plastic housing minimum: –20 °C (–4 °F).
• Storage temperature: –40 to +80 °C (–40 to +176 °F). Optional: –50 °C (–58 °F), –60 °C (–76 °F).
• Humidity: Operation up to 100 %.
• Operating altitude: Up to 2,000 m (6,600 ft) above sea level, extendable to 3,000 m (9,800 ft) with overvoltage protection.
• Degree of protection: IP68.

Mechanical construction

• Dimensions: See official PDF.
• Weight: See official PDF.
• Materials: See official PDF.
• Surface roughness: See official PDF.

Mounting

• Mounting location/orientation: Any orientation for pipe lengths up to approx. 500 mm (19.7 in). Vertical from above for long pipes.
• Minimum distance: 10 mm (0.39 in) between tuning fork and tank/pipe wall.
• Installation instructions: Consider viscosity. For low viscosity (< 2,000 mPa⋅s), the tuning fork can be within the installation socket. For high viscosity (≤ 10,000 mPa⋅s), the tuning fork must be outside the installation socket.
• Piping installation: Suitable for flow velocities up to 5 m/s (with 1 mPa⋅s viscosity and 1 g/cm³ density).

User Interface

• Onsite operation: Functional testing via test button or test magnet.
• Local display: Optional LED module VU120 for signaling operational status.
• Remote operation: Via output signals.
• Bluetooth®: Optional module VU121 for data readout and diagnostics via SmartBlue app.

Certificates and Approvals

• CE mark
• RCM marking
• Ex approval (details in separate Ex documentation)
• Functional safety (SIL2/SIL3)
• Marine approvals
• CRN approval
• EAC conformity

Accessories

• Test magnet
• Protective covers
• M12 socket
• Bluetooth module VU121
• LED module VU120
• Sliding sleeves (standard and high pressure)

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Disclaimer: 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