Endress+Hauser Liquiphant FTL50 (FTL50-KGQ2AA6G5A)

Vibronic Point Level Switch

The Endress+Hauser Liquiphant FTL50 (FTL50-KGQ2AA6G5A) is a universal vibronic point level switch for liquids. Its tuning fork design delivers reliable switching independent of the product's physical or chemical properties, making it ideal for overfill prevention, pump protection, and two-point control in tanks and pipelines.

Key Features & Benefits

• Universally Applicable: The robust tuning fork technology ensures reliable switching independent of flow, turbulence, air bubbles, foam, or changes in the medium's properties.

• Safe & Reliable Operation: Continuous self-monitoring ensures safe switching even in the event of a power supply failure (closed-circuit principle).

• SIL2/WHG Certified: Suitable for overfill protection and dry-run prevention applications. Certified per WHG (German Water Resources Act) and SIL2 (IEC 61508).

• No Calibration Required: Features a simple plug-and-play setup with no on-site adjustment needed. The factory preset switching point works for most applications.

• Compact & Robust Design: 316L stainless steel housing with hermetically sealed tuning fork, ideal for harsh industrial and hygienic environments. Surface roughness Ra < 0.8 µm available for hygienic applications.

• Large Temperature/Pressure Range: Process temperature from -50°C to +150°C and process pressure up to 64 bar (for specific versions).

• Versatile Mounting: Available with threaded connections (G1½, NPT 1½) or flanges, suitable for horizontal or vertical installation in tanks.
  
  
  

Specifications

• Manufacturer: Endress+Hauser

• Product Series: Liquiphant FTL50

• Measuring Principle: Vibronic (tuning fork)

• Application: Point level detection for liquids

• Process Temperature: -50°C to +150°C (dependent on version)

• Process Pressure: Up to 64 bar (for specific versions)

• Min. Density: > 0.7 g/cm³ (optional > 0.5 g/cm³)

• Process Connection: Thread G1½, NPT 1½, or flanges

• Wetted Materials: 316L stainless steel

• Output: 2-wire (NAMUR), 3-wire (DC-PNP), or relay output

• Certifications: ATEX, IECEx, WHG, SIL2

• Approvals: Suitable for hazardous areas (Zone 0/1/2)
  
  

Applications

• Overfill Prevention: WHG-certified for regulatory-compliant tank overfill protection in the chemical and petrochemical industries.

• Pump Protection: Dry-run protection for pumps in cooling circuits, lubrication systems, and sumps.

• Two-Point Control: Pump control or limit detection with MIN/MAX switching.

• Hygienic Applications: Suitable for use in the food & beverage and pharmaceutical industries (with appropriate housing and material finishes).

• Hazardous Areas: ATEX/IECEx certified for use in explosive atmospheres (gas and dust).
  
  

Why Choose the Liquiphant FTL50 (FTL50-KGQ2AA6G5A)?

• "Plug and Play" Simplicity: No calibration required, significantly reducing installation and commissioning time.

• Maximum Safety: Continuous self-monitoring and SIL2/WHG approvals guarantee the highest level of safety.

• High Long-Term Stability: No mechanical moving parts ensures maintenance-free operation and a long service life.

• Independent of Media: Switching is unaffected by conductivity, dielectric constant, pressure, temperature, or viscosity.

FAQs

Q1: Is the Liquiphant FTL50 suitable for safety applications like overfill protection?

A: Yes. The FTL50 is certified for use in overfill prevention systems according to WHG (Germany) and for functional safety in SIL2 applications per IEC 61508.

Q2: Does the FTL50 require on-site calibration after installation?

A: No. The FTL50 is a "plug and play" device. No calibration is required; it works immediately after being switched on.

Q3: What is the difference between the FTL50 and the compact FTL31?

A: The FTL50 is the standard version with a housing separate from the process connection (typically for terminal compartments), making it suitable for high temperatures (up to 150°C) and large connection sizes. The FTL31 is a compact version where the electronics are integrated into the sensor housing, suitable for standard applications and temperatures up to 70°C (ambient).