Liquipoint FTW33

Summary

Product identification

The Liquipoint FTW33 is a point level switch for liquid and pasty media, developed for the food and beverage industry. It meets international hygienic requirements and is suitable for flush-mounting. It can also be used for detecting foam.

Application

• Used preferably in storage tanks, mixing vessels, and pipes.
• Suitable for detecting foam.

Benefits

• Flush-mounted installation, pipes remain piggable.
• For water- and oil-based media with a dielectric constant ≥ 2.
• No adjustment to the medium required.
• Reliable switching function with buildup compensation.
• Compact design for easy installation in tight spaces.
• Wide range of process connections.
• Robust stainless steel housing, optionally 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 requirements of EU 1935/2004, 10/2011, 2023/2006, and FDA 21 CFR 177.2415.

Input

• Measured variable: Covered by medium at the electrode in contact with the process.
• Measuring range: Independent of electrical conductivity.
  • Standard: Water- or alcohol-based media, Dielectric constant ≥ 10.
  • Extended: Oil-based media (2 < DC < 10) or media that form heavy buildup.

Output

• Type: DC-PNP switch output.
• Function: Positive voltage signal at the switch output.
• Switching behavior: ON/OFF.
• Connectable load: 200 mA (short-circuit proof).
• Safety-oriented switching: MIN or MAX point level detection.
• Residual voltage: < 3 V.
• Residual current: < 100 µA.

Power supply

• Supply voltage: 10 to 30 V DC.
• Power consumption: < 1 W (at max. load: 200 mA).
• Current consumption: < 15 mA.

Electrical connection

• Requires operation with a fine-wire fuse 500 mA (slow-blow).
• Can operate in MAX or MIN mode depending on switch output evaluation.
• Features yellow and red LEDs for status indication (except for metallic housing cover).

Cable specification

• M12 connector: IEC 60947-5-2.
• Valve plug: Cable cross-section max. 1.5 mm² (16 AWG), Ø 3.5 to 6.5 mm (0.14 to 0.26 in).
• Cable (3LPE): Cable cross-section 0.75 mm² (20 AWG), Ø 6 to 8 mm (0.24 to 0.31 in), Material: PUR.

Performance characteristics

• Reference operating conditions: Ambient temperature 20 ±5 °C, Medium temperature 20 ±5 °C, Process pressure 1 bar, Medium: water, Conductivity approx. 200 µS/cm.
• Measured error: ±1 mm (0.04 in).
• Hysteresis: max. 1 mm (0.04 in).
• Non-repeatability: ±0.5 mm (0.02 in).
• Switching delay: 0.5 s (sensor covered), 1.0 s (sensor uncovered). Optional delays available.
• Switch-on delay: < 1 s.

Installation

• Can be installed in any position.
• For horizontal pipes, vertical orientation can affect measurement.

Environment

• Ambient temperature range: –40 to +70 °C (–40 to +158 °F).
• Storage temperature: –40 to +85 °C (–40 to +185 °F).
• Climate class: DIN EN 60068-2-38/IEC 68-2-38: test Z/AD.
• Altitude: Up to 2,000 m (6,600 ft) above sea level.
• Degree of protection: IP65, IP65/67, IP66/68/69K, IP66/68 depending on connection type.
• Shock resistance: a = 300 m/s² = 30 g.
• Vibration resistance: a(RMS) = 50 m/s², f = 5 to 2000 Hz.
• Cleaning: Resistant to typical cleaning agents.
• Electromagnetic compatibility: In accordance with EN 61326 series and NAMUR Recommendation EMC (NE 21).
• Reverse polarity protection: Integrated.
• Short-circuit protection: Integrated.

Process

• Process temperature range: –20 to +100 °C (–4 to +212 °F); up to 150 °C (302 °F) for 1 hour.
• Process pressure range: –1 to +25 bar (–14.5 to +362.5 psi).
• State of aggregation: Liquid.

Standard and Extended Settings

• Standard: For water- or alcohol-based media (Dielectric constant ≥ 10) with little or no buildup.
• Extended: For oil-based media (2 < DC < 10) or media that generate heavy buildup.

Mechanical construction

• Weight: approx. 300 g (10.58 oz).

Materials

• Materials in contact with process: Sensor: 316L (1.4404), PEEK. PEEK meets EU 1935/2004, 10/2011, 2023/2006 and FDA 21 CFR 177.2415. Process connection: 316L (1.4404/1.4435).
• Materials not in contact with process: Housing covers (316L or PPSU), Design ring (PBT/PC), Valve connector (PPSU), Plastic cable (PPSU), Housing (316L).
• Metallic surface in contact with process: Ra ≤0.76 µm (30 µin).

Operability

• Light signals (LED): Green (operational), Yellow (sensor state/switching state), Red (warning/malfunction). Note: No external LED signaling for metallic housing cover.
• Test magnet: Included for function testing and switching between Standard/Extended settings.

Certificates and approvals

• CE mark
• C-Tick symbol
• CSA C/US General Purpose
• 3-A Sanitary Standard No. 74-xx
• EHEDG TYPE EL - CLASS I

Ordering information

Detailed ordering information is available via the Endress+Hauser Product Configurator.

Accessories

• Process adapter M24
• Weld-in adapter
• Slotted nut DIN11851
• Test magnet
• Socket wrench
• Connecting cables with M12 connectors (various IP ratings and LED options).

Supplementary documentation

• Operating Instructions: BA00418F/00/EN
• Process adapter, weld-in adapter and flanges: TI00426F/00/EN

Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror