Liquiphant M FTL51 – Vibrating Fork Level Switch for Liquids
The Endress+Hauser Liquiphant M FTL51 is a vibrating fork (tuning fork) level switch for reliable point level detection in liquids. Its simple, robust design with no moving parts ensures long-term reliability with minimal maintenance.
Key Features
- Vibrating fork measurement principle – no moving parts
- Suitable for all liquids (viscosity up to 10,000 mPas)
- Process temperature: –50 to +150°C
- Process pressure: –1 to 100 bar
- SIL 2/3 capable (IEC 61508)
- ATEX, IECEx, cCSAus certified
- Output: SPDT relay, 4–20 mA
Applications
- High/low level alarm in storage tanks
- Overfill protection (SIL 2/3)
- Pump protection (dry-run detection)
- Interface detection between two liquids
Technical Specifications
| Parameter | Specification |
|---|---|
| Measuring principle | Vibrating fork (tuning fork) |
| Process temperature | –50 to +150°C |
| Process pressure | –1 to 100 bar |
| Max. viscosity | 10,000 mPas |
| Output | SPDT relay, 4–20 mA |
| SIL | SIL 2/3 (IEC 61508) |
| Protection class | IP66/IP67/IP68 |
| Approvals | ATEX, IECEx, cCSAus, NEPSI, FM |
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