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Point level detection
Liquiphant FTL20

Point level switch in compact design with stainless steel housing

  • Liquiphant FTL20 ©Endress+Hauser
  • Liquiphant FTL20 application ©Endress+Hauser
  • Vibronic measuring principle

Liquiphant FTL20 is a point level switch with compact design. FTL20 is used in tanks, containers and pipelines, in cleaning and filtering systems and coolant and lubricant tanks as an overfill prevention or as a pump dry-run protector. The FTL20 is ideal for applications which previously used float switches and conductive, capacitive and optical sensors. Functional check in installed state per magnet from the outside possible.


  • Operational safety, reliability and universal applicability through use of the tuning fork measuring principle

  • Measurement is unaffected by conductivity, build-up, turbulence, flows or air bubbles

  • Simple and fast commissioning. No calibration required

  • No mechanically moved parts, free of maintenance

  • Safe function due to self-monitoring (active frequency monitoring of the fork)

  • Easy recurring function test via test magnet

  • Suitable for constricted space due to compact design

Field of application

Point level switch in compact design with stainless steel housing.

  • Process connection: Threads

  • Temperature: -40 to +150°C (-40 to +302°F)

  • Pressure: -1 to +40bar (-14.5 to +580psi)

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

Features and specifications

Documents / Manuals / Software

Accessories / Spare parts

Predecessor / Successor

Successor: Liquiphant FTL31


Endress+Hauser AG
Kägenstrasse 2 4153 Reinach BL Switzerland
Tel.: +41 61 715 7700
Fax: +41 61 715 2888
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