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Endress+Hauser Liquiphant FTL31 Vibronic Point Level Switch (Order Code: FTL31-AA4M2AAWBJ / FTL31-1102/0)

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Product Name: Endress+Hauser Liquiphant FTL31 Vibronic Point Level Switch (Order Code: FTL31-AA4M2AAWBJ / FTL31-1102/0)
Product Model: FTL31-AA4M2AAWBJ / FTL31-1102/0
Manufacturer: Endress+Hauser
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Product Description

Primary: Endress+Hauser Liquiphant FTL31, FTL31-AA4M2AAWBJ, vibronic level switch, tuning fork level sensor Technical: Point level switch for liquids, 10-30VDC PNP output, G1/2 thread level switch, 316L stainless steel sensor Application: Overfill protection switch, pump dry-run protection, industrial level detection Features: No calibration, plug and play, M12 connector, IP67 rated, IO-L

Endress+Hauser Liquiphant FTL31 Vibronic Point Level Switch (Order Code: FTL31-AA4M2AAWBJ / FTL31-1102/0)

Endress+Hauser Liquiphant FTL31 Vibronic Point Level Switch
(Order Code: FTL31-AA4M2AAWBJ / FTL31-1102/0)


The Endress+Hauser Liquiphant FTL31-AA4M2AAWBJ is a compact, reliable point level switch for liquids, utilizing vibronic (tuning fork) technology. Designed for universal industrial applications, it is ideal for overfill protection, pump dry-run protection, and level detection in tanks, vessels, and pipes .

Key Features and Product Highlights

  • Tuning Fork Technology: Provides safe and reliable switching independent of media properties such as conductivity, buildup, turbulence, flow conditions, or air bubbles .

  • Compact & Robust Design: Features a small form factor made of 316L stainless steel with a surface finish of Ra < 3.2 μm, ensuring durability and suitability for hygienic applications .

  • PNP 3-Wire Output: Operates on a 10 to 30 VDC supply with a standard 3-wire PNP switching output, compatible with most PLCs and control systems .

  • Easy Installation: Utilizes a G1/2 ISO228 thread process connection and an M12 plug for quick electrical connection .

  • Simple Commissioning: Features a plug & play design with no calibration required. A built-in LED indicator provides visual status and supports external function testing with a test magnet .

  • Rugged Environmental Protection: Rated IP65/67, suitable for harsh industrial environments .

Technical Specifications

Parameter Specification
Manufacturer Endress+Hauser
Product Series Liquiphant FTL31
Measuring Principle Vibronic (Tuning Fork) 
Application Point level detection for liquids 
Process Connection G1/2" Thread (ISO228) 
Wetted Materials 316L Stainless Steel 
Output Type 3-Wire / PNP 
Supply Voltage 10 to 30 VDC 
Electrical Connection M12 Plug 
Process Temperature -40°C to +100°C (Sensor) / up to 150°C (max) 
Ambient Temperature -40°C to +70°C 
Process Pressure Vacuum to 40 bar (580 psi) 
Min. Medium Density >0.7 g/cm³ (>0.5 optional) 
Housing Material 316L Stainless Steel 
Protection Rating IP65 / IP67, NEMA Type 4X 
Certifications CSA C/US, EAC, WHG Overfill Protection 


Applications

  • Overfill Protection: Prevents tank overflow in storage vessels .

  • Pump Dry-Run Protection: Safeguards pumps in cleaning systems, cooling circuits, and lubrication vessels .

  • Chemical & Industrial: Reliable point level detection in liquids, unaffected by changing media properties .

  • General Purpose: Suitable for tanks, pipes, and vessels in the machinery industry .


    Endress+Hauser Liquiphant FTL31-AA4M2AAWBJ | Vibronic Point Level Switch | PNP
    • Safe & Reliable: Continuous self-monitoring ensures safe switching, even during power supply loss .

    • Maintenance-Free: No moving parts eliminate wear and reduce maintenance costs .

    • Independent of Media: Accurate switching unaffected by conductivity, foam, or turbulence .

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

    • Global Approvals: WHG, marine approvals, and inspection certificates available 

    Endress+Hauser Liquiphant FTL31-AA4M2AAWBJ tuning fork level switch. 10-30VDC, PNP output, G1/2 thread, 316L, M12 plug, -40 to 70°C ambient.

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