The Liquiphant FTL31 is a point level switch for liquids and is used in tanks, vessels
It is used for overfill prevention or pump protection in cleaning and filter systems as
well as in cooling and lubrication vessels, for instance.
Ideal for applications in which float switches or conductive, capacitance and optical
sensors have been used up to now. The Liquiphant FTL31 also works in areas where
these measuring principles are not suitable due to conductivity, buildup, turbulence,
flow conditions or air bubbles.
The Liquiphant FTL31 can be used for process temperatures up to:
- 100 °C (212 °F)
- 150 °C (302 °F)
Not suitable for hazardous areas.
The use of the Liquiphant FTL33 is recommended for hygiene areas.
- Operational safety, reliability and universal application thanks to the tuning fork measuring principle
- Robust stainless steel housing (316L)
- External function test with test magnet
- Onsite function check possible thanks to LED indication
- Compact design for easy installation even in confined conditions or hard-to-access areas
A piezoelectric drive causes the tuning fork of the Liquiphant FTL31 to vibrate at its resonance
frequency. When the tuning fork is immersed in a liquid, its intrinsic frequency changes due to the
change in density of the surrounding medium. The electronics system in the point level switch
monitors the resonance frequency and indicates whether the tuning fork is vibrating in air or is
covered by liquid.
A signal is output via the DC-PNP or AC/DC electrical connection.
The measuring system consists of a Liquiphant FTL31 point level switch, e.g. for connection to
programmable logic controllers (PLC), a mini-contactor or solenoid valve.