ENDRESS+HAUSER  FTI51-AAH1GCJW2A1A

Field of application

The Liquicap M FTI5x is used for point level detection. It is preferably used for the following measuring tasks:

• Detection of liquids and pastes that are highly viscous and tend to form buildup
• Interface detection of different liquids (e.g. oil on water)
• Two-point control (e.g. pump control) with just one process connection
• Foam detection of conductive liquids

Thanks to its robust and tried-and-tested construction, the probe can be used both in vacuums and in overpressure up to 100 bar. The materials used allow operating temperatures from –80 °C to +200 °C.

Your benefits

• Active buildup compensation for high-viscosity media
• Easy and fast commissioning at the press of a button
• Universal application thanks to wide range of certificates and approvals
• Corrosion-resistant, FDA-listed materials in contact with the process
• Two-stage overvoltage protection against discharge from the container
• Short reaction times
• No need for recalibration after replacing electronics
• Use in safety systems with specific requirements in terms of functional safety to SIL2/SIL3
• Automatic monitoring of electronics

Measuring principle

The principle of capacitance point level detection is based on the change in capacitance of the capacitor due to the probe being covered by liquid. The probe and container wall (conductive material) form an electric capacitor. When the probe is in air (1), a certain low initial capacitance is measured. When the container is filled, the capacitance of the capacitor increases the more the probe is covered (2), (3). The point level switch switches when the capacitance C S specified during calibration is reached. In addition, a probe with inactive length ensures that the effects of medium buildup or condensate near the process connection are avoided. Active buildup compensation compensates influences resulting from buildup on the probe.