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Point level detection
Liquiphant FTL51H

Point level switch with extension tube for liquids especially in the food and life sciences industry

  • Liquiphant FTL51H ©Endress+Hauser
  • Liquiphant FTL51H ©Endress+Hauser
  • Vibronic measuring principle

Liquiphant FTL51H is a point level switch with extension tube for use in hazardous areas with all international certificates. Especially useable in the food and life sciences industry with hygienic certificates (3-A, EHEDG, ASME BPE). FTL51H offers functional safety SIL2/SIL3. Reliable measurement values, not affected by: changing media properties, flow, turbulences, gas bubbles, foam, vibrations or build-up.


  • International hygienic certificates (3-A, EHEDG, ASME BPE). FDA-conformed material

  • Electro-polished and passivated surface finishing

  • International explosion protection certificates and overfill prevention certificate (WHG)

  • No mechanically moving parts: no maintenance, no wear, long operating life.
    Monitoring of fork for damage: guaranteed function

  • Use in safety systems requiring functional safety to SIL2/SIL3 in accordance with
    IEC 61508/IEC 61511-1

  • No calibration required, easy to start up

  • Variety of standardized hygienic process connections for hygiene sensitive applications

Field of application

Point level switch for all liquids with electro-polished surface finishing.

  • Process connections: Threads, flanges and hygienic process connection (Tri-Clamp, dairy coupling, aseptic, DRD, SMS, Varivent)

  • Temperature: -50 to +150°C (-58 to +302°F)

  • Pressure: -1 to +64bar (-14.5 to +928psi)

  • Sensor material: 316L

  • International explosion protection certificates, overfill prevention WHG, SIL, hygienic certificates, marine approvals

Features and specifications

Documents / Manuals / Software

Accessories / Spare parts

Predecessor / Successor

Predecessor: CS1103, CS1113, CS1203, CS1213, CS1603, CS1613, FDL30, FDL31, FDL35, FDL36, Liquiphant FTL330H, Liquiphant FTL330L, FTL360, FTL361, FTL365, FTL366

Density measurement of liquids with Density Computer FML621

Measurement of density, reference density, concentration of liquids in conjunction with a Liquiphant. Also for use in hazardous areas with international explosion protection certificates.

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Endress+Hauser Inc.
2350 Endress Place Greenwood , IN 46143 United States
Tel.: 888-363-7377
Fax: 317-535-8498
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