Process Control Instruments and Field Devices
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EH Liquipoint FTW33 Conductive Point level very compact probe for liquid and pasty media in hygienic applications. Flush-mounted. 10-30VDC. 316L Sensor. 3-wire PNP Output. G1 to G3/4 Thread Process Connection. CSA C/US Approval.

Part# with Options:        FTW33-AA4MW5J
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The Liquipoint FTW33 is a point level switch for liquid and pasty media.

It is used preferably in storage tanks, mixing vessels and pipes. Developed and built for the food and beverage industry, the Liquipoint FTW33 meets international hygienic requirements.

It is particularly suited to applications where flush-mounting is necessary.

The Liquipoint FTW33 can be used permanently in process temperatures up to 100 C (212 F) and for 60 minutes in cleaning and sterilization processes up to 150 C (302 F).

The Liquipoint FTW33 can also be used for detecting the foam that commonly occurs within the food and beverage industry.

  • Flush-mounted installation, pipes remain piggable
  • For water- and oil-based media with a dielectric constant ≥ 2
  • No adjustment to the medium in question is required
  • Reliable switching function due to compensation even in the case of heavy buildup
  • Easy installation thanks to compact design - even in tight conditions or where access is restricted
  • Wide range of process connections for installation in new or existing systems
  • Robust stainless steel housing, optionally available with M12x1 connector with IP69K protection
  • Onsite function check via LED indication
  • Can be cleaned and sterilized in place (CIP/SIP)
  • 3-A and EHEDG certificates
  • Meets the requirements of EU 1935/2004, 10/2011 as well as 2023/2006 and FDA 21 CFR 177.2415
Measuring principle

A low, galvanically isolated AC voltage is applied at the electrode in contact with the process. If liquid or pasty media come in contact with the electrode, a measurable current flows and the Liquipoint FTW33 switches. Active buildup compensation ensures reliable switching of the measuring device even if buildup occurs on the sensor.

Measuring Principle Conductive
Characteristic / Application Compact point level switch for using in pipes and in storage, mixing and process vessels with or without an agitator, for water based or oil based media, with active build up compensation,flush mounting
Specialities CIP and SIP suitable
Conductive foam is detectable or can be switched off
Supply / Communication 1030 V DC
Ambient temperature -40 ... 70C
(-40 ... 158F)
Process temperature Standard: -20 ... 100C
Cleaning: -20 ... 150C for 1h
( -4 ... 302F for 1h)
Process pressure absolute / max. overpressure limit Vacuum ... 25 bar
(Vacuum ... 362,5 psi)
Main wetted parts Sensor: 316L
Sensor isolation: PEEK
Process connection Thread G1, G1/2, G3/4, M24
Process connection hygienic Clamp ISO 2852 1 to 1 1/2", 2",
DIN11851 Pipe union
Communication DC PNP
Certificates / Approvals CSA C/US
Design approvals EN 10204-3.1
Hygienic approvals 3A, EHEDG
Options Weld-in adapter,
Process adapter for hygienic process connections
Export Info
Harmonized Tariff Code (HTC)9026107000

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