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Designed specifically for the process industry, the Liquiphant FTL51B is intended for direct use in SIL2 and SIL3 applications. Using an easy-to-use wizard, you do periodic proof tests in accordance with SIL or WHG mobile. You are provided with automated documentation at the conclusion. Changes in medium characteristics, flow, turbulence, gas bubbles, foam, vibrations, or buildup have no effect on Liquiphant’s accurate measurement. The gadget is user-friendly, provides real-time data, and has a digital link.
The Liquiphant FTL51B is a robust, digital vibrating fork level switch designed for reliable point level detection of liquids in all industries. With its safety-oriented design, IIoT capabilities, and no need for calibration, the FTL51B ensures safe and maintenance-free operation for tank overfill protection and pump dry-run protection. It is especially suited for safety-critical applications (SIL2/3 certified) and provides advanced self-monitoring and diagnostics via Heartbeat Technology.
Liquiphant FTL51B – Level Sensors
Features:
✅ Reliable vibrating fork technology
✅ SIL2/3 certified for safety-critical applications
✅ Heartbeat Technology for diagnostics & monitoring
✅ HART, Bluetooth®, IO-Link communication
✅ No calibration or adjustment needed
✅ IIoT-ready with Netilion support
✅ Robust 316L stainless steel construction
The Liquiphant FTL51B is a smart vibrating fork level switch for reliable point level detection in liquids. It operates independently of media properties, requires no calibration, and is ideal for safety-critical applications with SIL2/3 certification. With digital communication (HART, IO-Link, Bluetooth®) and Heartbeat Technology, it ensures efficient diagnostics and predictive maintenance.
Description
Technical Data
Technical Data
Endress+Hauser Liquiphant FTL51B
🔹 Liquiphant FTL51B
▾
Measuring Principle Vibrating fork (tuning fork) Device Type Point level switch for liquids Minimum Media Density ≥ 0.5 g/cm³ Process Temperature –50 °C to +150 °C Process Pressure –1 to +64 bar Fork Lengths 40 mm to 1,000 mm Output Options 2-wire (NAMUR, 4...20 mA), 3-wire (PNP), Relay, HART, IO-Link, Bluetooth® Process Connections Threaded (G/NPT), Flanged (DIN/ANSI), Hygienic (Tri-Clamp, Varivent®, etc.) Housing Material 316L stainless steel, aluminum, plastic Wetted Materials 316L, Alloy C22 (depending on variant) Ingress Protection IP66/67/68, NEMA 4X, Type 6P Ambient Temperature –50 °C to +85 °C Communication Protocols HART, IO-Link, Bluetooth® (via SmartBlue App) Functional Safety SIL2/3 certified per IEC 61508 Self-Diagnostics Heartbeat Technology – status, proof test, and monitoring Hazardous Area Approvals ATEX, IECEx, FM, CSA, NEPSI
Application
Application
- Overfill protection in tanks and vessels
- Pump protection (dry-run prevention)
- Liquid level detection in storage and process tanks
- Suitable for aggressive, viscous, and clean-in-place (CIP/SIP) media
- Chemical, oil & gas, food & beverage, pharmaceutical, and water industries
- Use in safety-critical processes (SIL2/3 loops)
- Hygienic applications with hygienic process connections (EHEDG, 3-A approved versions)
Downloads
Downloads
Technical Datasheets: Liquiphant FTL51B – digital, simple and safe
Supply & Shipping Details
Supply & Shipping Details
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