Liquiphant M FTL50H

Summary

Product Identification

• Product Name: Liquiphant M
• Models: FTL50, FTL51, FTL50H, FTL51H
• Technology: Vibronic Point Level Switch
• Application: Suitable for all kinds of liquids, including use in hazardous areas, food, and pharmaceutical industries. Ideal substitute for float switches, unaffected by flow, turbulence, bubbles, foam, vibration, solids content, or buildup.
• Certifications: FTL50H and FTL51H are certified for food and pharmaceutical industries.
• Design Standards: In accordance with ASME B31.3; ASME BPE for life science industry applications.

Operating Limits

• Process Temperatures: –50 °C to 150 °C (–58 °F to 302 °F)
• Pressures: Up to 100 bar (1450 psi)
• Viscosities: Up to 10,000 mm²/s (cSt)
• Minimum Liquid Density: ≥ 0.5 g/cm³ (SGU)

FTL50 and FTL51 Variants

• FTL50: Compact design.
• FTL51: Features an extension pipe up to 3 m (9.8 ft), with 6 m (20 ft) available on request.
• FTL50H / FTL51H: Hygienic versions with polished tuning forks and hygienic process connections.

Electronic Inserts and Functions

The Liquiphant M is modular, allowing different electronic inserts to be used:

• FEL51: AC 2-wire version; switches load directly into the power supply circuit.
  • Supply Voltage: AC 19 to 253 V
  • Power Consumption: < 0.83 W
  • Residual Current: < 3.8 mA
  • Output on Alarm/Failure: < 3.8 mA
• FEL52: DC PNP 3-wire version; switches load via transistor.
  • Supply Voltage: DC 10 to 55 V
  • Current Consumption: ≤ 15 mA
  • Power Consumption: ≤ 0.83 W
  • Output on Alarm/Failure: < 100 μA
• FEL54: AC/DC version with relay output (2 floating change-over contacts).
  • Supply Voltage: AC 19 to 253 V, 50/60 Hz or DC 19 to 55 V
  • Power Consumption: ≤ 1.3 W
• FEL55: 8/16 mA 2-wire version for signal transmission to PLCs/AI modules.
  • Supply Voltage: DC 11 to 36 V
  • Power Consumption: < 600 mW
  • Output on Alarm/Failure: < 3.6 mA
• FEL56: NAMUR L-H edge 2-wire version for separate switching units.
  • Supply Voltage: DC 8.2 V ±20 %
  • Power Consumption: < 6 mW to < 38 mW
  • Output on Alarm/Failure: > 2.2 mA
• FEL58: NAMUR H-L edge 2-wire version for separate switching units.
  • Supply Voltage: DC 8.2 V ±20 %
  • Power Consumption: < 6 mW to < 38 mW
  • Output on Alarm/Failure: < 1.0 mA
• FEL57: PFM signal transmission for separate switching units (e.g., Nivotester).
  • Supply Voltage: DC 9.5 to 12.5 V
  • Current Consumption: 10 to 13 mA
  • Power Consumption: < 150 mW
  • Output on Alarm/Failure: 0 Hz
• FEL50A: PROFIBUS PA interface for digital communication.
  • Bus Voltage: DC 9 to 32 V
  • Bus Current: 12.5 mA ±1.0 mA (SW 01.03.00, HW 02.00) or 10.5 mA ±1.0 mA (SW 01.03.00, HW 01.00)
• FEL50D: For connecting to Density Computer FML621 for continuous density measurement.

Performance Characteristics

• Maximum Measured Error: ±1 mm (0.04 in) under reference conditions.
• Repeatability: 0.1 mm (0.004 in).
• Hysteresis: Approx. 2 mm (0.08 in).
• Influence of Medium Temperature: max. +1.8 to –2.8 mm.
• Influence of Medium Density: max. +4.8 to –3.5 mm (for 0.5 to 1.5 g/cm³ SGU).
• Influence of Medium Pressure: max. 0 to –2.5 mm (for -1 to 64 bar).
• Switching Delay (Standard):
  • When covered: Approx. 0.5 s
  • When exposed: Approx. 1.0 s
  • Configurable for PROFIBUS PA (0.5-60 s); other options available on request.

Environmental and Mechanical

• Ambient Temperature Range: -50 °C to +150 °C (depending on electronic insert and housing).
• Degree of Protection: IP69 rating on compact stainless steel housing for intensive cleaning.
• Vibration Resistance: See official PDF for tabulated values.
• Mechanical Construction: Stainless steel housing (optional).

Disclaimer

This information is extracted from a datasheet and may not be exhaustive. Figures, footnotes, or revisions not present in the extracted text are not included. Contractual data must be verified against the official OEM PDF revision applicable to the specific project.

Official datasheet (PDF)

Lenntech datasheet mirror