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The Endress+Hauser FTL31-AA4M3AAWBJ is a high-quality, compact tuning fork level switch designed for precise point level detection in liquids. Engineered for robustness and simplicity, this device is a perfect solution for applications requiring overfill protection, dry-run protection, or pump control in small tanks, pipes, and vessels. Its maintenance-free operation and high immunity to process conditions make it a dependable choice across various industries.
Key Features & Benefits for Your Application
Universal Application: Suitable for a wide range of liquids, including water, fuels, oils, chemicals, and viscous media up to 10,000 mPa·s.
Compact Fork Design: The small 40mm fork (AA4) is ideal for installation in narrow spaces, such as small nozzles or pipes, with minimal process intrusion.
High Reliability & Safety: Tuning fork technology ensures fail-safe operation. The device continuously monitors its own functionality and is insensitive to foam, bubbles, turbulence, or material buildup.
Simple Installation & Setup: No calibration required. The "Teach-In" function allows for quick, one-button setup directly on the device, drastically reducing commissioning time.
Robust Construction: Built with high-grade materials (stainless steel 316L fork, PPSU housing), it withstands demanding industrial environments. The IP66/IP67 enclosure rating ensures protection against dust and water ingress.
Clear Process Visibility: Integrated LED status indicator provides local visual feedback on the switch state and device health.
Technical Specifications & Ordering Code (FTL31-AA4M3AAWBJ)
Product Family: FTL31 – Compact level switch, tuning fork principle.
Process Connection: M3 = G ¾" external thread.
Fork Length: AA4 = 40 mm, short version.
Process Temperature Range: -50…+150 °C (-58…+302 °F).
Process Pressure Range: Up to 40 bar (580 psi) at 20°C.
Electrical Connection: WBJ = M12 × 1 connector, 4-pin.
Output Signal: SPDT electromechanical relay (changeover contact).
Power Supply: 24 V DC standard.
Approvals: CE, EAC, RoHS compliant. SIL 2 capable according to IEC 61508.
Typical Applications
Overfill Prevention: Reliable high-level cutoff in storage and day tanks.
Pump Control & Protection: Low-level detection to prevent pump dry-running.
Liquid Presence Detection: In pipelines, skids, or compact machinery.
Interface Detection: Differentiates between liquid and foam layers.
Industries Served: Chemical, pharmaceutical, food & beverage, water & wastewater, OEM machinery, power generation.
Why Choose Endress+Hauser?
Endress+Hauser is a global leader in measurement instrumentation, service, and solutions for industrial process engineering. Choosing the FTL31-AA4M3AAWBJ means investing in:
Reduced Downtime: Maintenance-free operation and long-term stability.
Easy Integration: Simple wiring and setup with standard M12 connectors.
Global Support: Worldwide service network for installation support and training.
Keywords:
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