Liquiphant M FTL50

Summary

Product Identification

• Product Line: Liquiphant M
• Models: FTL50, FTL51, FTL50H, FTL51H
• Type: Vibronic point level switch for all kinds of liquids.
• Certifications: FTL50H and FTL51H are certified for food and pharmaceutical industries.

Application

• Point level detection (maximum or minimum) in tanks or pipes.
• Suitable for use in hazardous areas, food, and pharmaceutical applications.
• Ideal substitute for float switches, unaffected by flow, turbulence, bubbles, foam, vibration, solids content, or buildup.

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)
• Liquid Densities: ≥ 0.5 g/cm³ (SGU)

Model Variants

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

Features and Benefits

• Recommended for safety systems requiring functional safety to SIL2/SIL3 per IEC 61508/IEC 61511-1.
• Design in accordance with ASME B31.3.
• Recommended for sterile applications in the life science industry (design in accordance with ASME BPE).
• No adjustment required for quick, low-cost startup.
• No mechanically moving parts: no maintenance, no wear, long operating life.
• Monitoring of tuning fork for damage.
• Compact stainless steel housing available with IP69 protection rating.

Electronic Inserts (Summary)

The Liquiphant M system is modular with various electronic inserts offering different functionalities:

• FEL51: 2-wire AC version, switches load directly into power supply circuit.
• FEL52: 3-wire DC PNP version, switches load via transistor for PLC integration.
• FEL54: Universal AC/DC version with relay output (2 floating change-over contacts).
• FEL55: 8/16 mA signal transmission for PLC AI modules.
• FEL56: NAMUR L-H edge signal (0.6 to 1.0 / 2.2 to 2.8 mA) for separate switching units.
• FEL58: NAMUR H-L edge signal (2.2 to 3.5 / 0.6 to 1.0 mA) for separate switching units.
• FEL57: PFM signal transmission for Endress+Hauser switching units (Nivotester) with proof test capability.
• FEL50A: PROFIBUS PA communication.
• FEL50D: For connecting to Density Computer FML621 for 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).
• Influence of Medium Pressure: Max. 0 to -2.5 mm (for 1 to 64 bar).

Operating Conditions

• Ambient Temperature Range: -50 °C to +150 °C (depending on housing and electronic insert).
• Storage Temperature: -50 °C to +80 °C.
• Degree of Protection: Up to IP69 (compact stainless steel housing).
• Vibration Resistance: See official PDF for details.
• Electromagnetic Compatibility: See official PDF for details.

Mechanical Construction

• Dimensions: Refer to the official PDF for detailed dimensions.
• Materials: Stainless steel housing options available.
• Process Connections: Various options available, including hygienic connections for H models.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror