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- Flush-mounted installation, pipes remain piggable
- For water- and oil-based media
- Reliable switching function due to compensation even in the case of heavy buildup
Specs at a glance
Product Liquid, pasty and sticky media (DC ≥ 2) Installation Vessels and pipes Process temperature range –20 to +100 °C (–4 to +212 °F)
(For 1 hour: +150 °C (+302 °F))Process pressure range –1 to +25 bar
(–14.5 to +362.5 psi)Product / Version Price / pcs. in EUR Order code Electrical Connection Process Connection 1 to 3 4 to 10 11+ Plug M12, IP65/67 NEMA Type 4 Encl. Thread ISO228 G1, 316L, install > accessory weld-in adapter 274,- 247,- 225,- FTW33-AA4MWSJ Thread G1/2, 316L install > process sleeve hygienic 270,- 243,- 221,- FTW33-AA4MWVJ Thread ISO228 G3/4, 316L, install > accessory weld-in adapter 263,- 237,- 216,- FTW33-AA4MW5J DIN11851 DN25 PN40 w/o slutted-nut, 316L 308,- 277,- 253,- FTW33-AA4M1AJ DIN11851 DN40 PN40 w/o slutted-nut, 316L 308,- 277,- 253,- FTW33-AA4M1CJ Tri-Clamp ISO2852 DN25-38 (1..1-1/2"), 316L, DIN32676 DN25-40 308,- 277,- 253,- FTW33-AA4M3CJ Tri-Clamp ISO2852 DN40-51 (2"), 316L, DIN32676 DN50 308,- 277,- 253,- FTW33-AA4M3EJ Plug M12, IP66/68/69 NEMA Type 4/6P Encl. Thread ISO228 G1, 316L, install > accessory weld-in adapter 296,- 266,- 243,- FTW33-AA4NWSJ Thread G1/2, 316L install > process sleeve hygienic 292,- 262,- 239,- FTW33-AA4NWVJ Thread ISO228 G3/4, 316L, install > accessory weld-in adapter 285,- 256,- 234,- FTW33-AA4NW5J DIN11851 DN25 PN40 w/o slutted-nut, 316L 330,- 297,- 271,- FTW33-AA4N1AJ DIN11851 DN40 PN40 w/o slutted-nut, 316L 330,- 297,- 271,- FTW33-AA4N1CJ Tri-Clamp ISO2852 DN25-38 (1..1-1/2"), 316L, DIN32676 DN25-40 330,- 297,- 271,- FTW33-AA4N3CJ Tri-Clamp ISO2852 DN40-51 (2"), 316L, DIN32676 DN50 330,- 297,- 271,- FTW33-AA4N3EJ Accessories
Product / Version Price / pcs. in EUR Order code Weld-in adapter G3/4 d=50, 316L Flush mount process connection. For vessel-mounting. Material: 316L. Seal: silicone O-ring. FDA, EHEDG, 3-A compliant. Usage: FTL20/FTL20H, FTL31/FTL33, FTW23, FTW33, FMI51, FTI51. Usage: TMR35. 24,95 71258355 Weld-in adapter G3/4, d=29, 316L Flush mount process connection. For pipe-mounting. Material: 316L. Seal: silicone O-ring. FDA, EHEDG compliant. Usage: FTL20/FTL20H, FTL31/FTL33, FTW23, FTW33. 25,17 71258357 Weld-in adapter G1, d=60, 316L Flush mount process connection. Material: 316L. Seal: silicone O-ring. FDA, EHEDG, 3-A compliant. Usage: FMI51/FMI52, FTI51/FTI52, FTL20/FTL20H, FTL31/FTL33, FTL50/FTL50H/FTL51/FTL51C/FTL51H, FTL80/FTL81, FTL260, FTW23, FTW33, PMP23, PMP51, PMP135, PTP33B/PTP35. Usage: TM401/TM411, TMR35. 36,56 52001051 Weld-in adapter G1, d=53, 316L Flush mount process connection. Material: 316L. Seal: silicone O-ring. FDA, EHEDG, 3-A compliant. Usage: FMI51/FMI52, FTI51/FTI52, FTL20H, FTL31/FTL33, FTL50/FTL50H/FTL51/FTL51C/FTL51H, FTL80/FTL81, FTL260, FTL330H/FTL330L, FTW23, FTW33, PMP135, PTP35. 36,57 71258358 Cable 4x0.34, box M12, 316L,LED,90o,L=5m M12 socket for plug + integrated LED. 5m cable PVC, 316L lock. Especially for hygiene applications. Usage: device + switch output. 19,57 52018763 Cable 4x0.34, box M12,Cu Sn/Ni,90o,L=5m M12 plug connector. 5m cable PVC, Cu Sn/Ni lock. Usage: FMB50/FMB51/FMB52/FMB53, FTL31/FTL33, FTW23, FTW33, PMC11, PMC21, PMC51, PMP11, PMP21/PMP23, PMP51/PMP55, PTC31B, PTP31B/PTP33B. 6,82 52010285 Socket for plug 4p-125V, 4A-M12 M12 socket for plug. Self confectionery connection. Usage: plug M12. 14,99 52006263 Usage: FTL20/FTL20H, FTL31/FTL33, FTL50/FTL50H/FTL51/FTL51H, FTW23, FTW33. 6,82 71267011 Prices valid until 31.08.2018 in EUR per unit (not including shipping and applicable sales tax). See
Endress+Hauser Terms and ConditionsIs this Liquipoint level switch not the perfect match for your application?
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Application
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.
Function
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.Application Example
The measuring system consists of a Liquipoint FTW33 point level switch, e.g. for connection to programmable logic controllers (PLC).
a) Overfill protection or upper level detection (MAX)
b) Pump dry running protection (MIN)
c) Lower level detection (MIN)
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Technical data
OutputFunction 3-wire DC-PNP
Positive voltage signal at the switch output of the electronics
Connectable load 200 mA (short-circuit proof) Residual voltage <3 V Residual current <100 μA Supply voltage 10 to 30 V DC Power consumption <1 W (at max. load: 200 mA) Current consumption <15 mA Cable specification – M12 connector: IEC 60947-5-2
– Valve plug: Cable cross-section ≤1,5 mm² (16 AWG ); ⌀ 3,5...6,5 mm
– Cable: Cable cross-section 0,75 mm² (AWG 20)
Connecting cable
lengthmax. 25 Ω/core, total capacitance < 100 nF Performance characteristicsReference operating
conditionsHorizontal orientation:
– Ambient temperature: 20 °C (68 °F) ±5 °C
– Medium temperature: 20 °C (68 °F) ±5 °C
– Process pressure: 1 bar (14.5 psi)
– Medium: water
– Conductivity: approx. 200 μS/cm
Measured error ±1 mm (0.04 in) in accordance with DIN 61298-2 Hysteresis max. 1 mm (0.04 in) Non-repeatability ±0.5 mm (0.02 in) in accordance with DIN 61298-2 Switching delay 0.5 s when sensor is covered;
1.0 s when sensor is uncovered
Switch-on delay <1 s (no defined switching status before this) Orientation any position EnvironmentAmbient temperature
range–40 to +70 °C (–40 to +158 °F) (at TProcess ≤ 90 °C (194 °F)),
–40 to +45 °C (–40 to +113 °F) (at TProcess = 150 °C (302 °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 Degree of protection – IP65 (valve plug)
– IP65/67 NEMA Type 4X Enclosure (connector for plastic housing cover)
– IP66/68/69K NEMA Type 4X/6P Enclosure (M12 connector for metal housing cover)
– IP66/68 NEMA Type 4X/6P Encl. (cable)
Cleaning Resistant to typical cleaning agents from the outside, in accordance with Ecolab test.
Electromagnetic
compatibilityIn accordance with EN 61326-Serie series and NAMUR Recommendation EMV (NE 21).
Short-circuit
protectionOverload protection/short-circuit protection at I > 250 mA; the sensor is not destroyed. Intelligent monitoring: Testing for overload at intervals of approx. 1.5 s; normal operation resumes once the overload/short-circuit has been rectified
ProcessProcess temperature
range–20 to +100 °C (–4 to +212 °F) (For 1 hour: +150 °C (+302 °F)) Process pressure range –1 to +25 bar (–14.5 to +362.5 psi) Standard and
ExtendedThe following settings can be made on the device using the test magnet:
– Standard: For water- or alcohol-based media (DC ≥ 10)
– Extended: For oil-based media (2 < DC < 10) or media which generate heavy buildup
Mechanical constructionWeight approx. 300 g (10.58 oz) Materials in contact
with process– Sensor: 316L (1.4404), PEEK The material PEEK meets the requirements of EU 1935/2004, 10/2011 as well as
2023/2006 and FDA 21 CFR 177.2415– Process connection: 316L (1.4404/1.4435)
Materials not in
contact with processHousing covers:
– M12 metal: 316L (1.4404)
– M12 plastic: PPSU; Design ring: PBT/PC
– Valve connector, plastic: PPSU
– Plastic cable: PPSU; Housing: 316L (1.4404)
Surface Ra ≤ 0.76 μm (30 μin) ApprovalsApproval CSA C/US General Purpose Sanitary compatibility 3-A; EHEDG Dimensions in mm (inches)
Housing, Electrical connection
a) Metal M12
b) Plastic M12
c) Plastic valve plug
Installation according to instruction manual
Process connections
a) Clamp DN25-38; 1...1½"
b) Clamp DN40, 2"
c) Milk pipe DN25, PN40
d) Milk pipe DN40, PN40
e) Thread G¾"
f) Thread G1"
g) Thread M24×1,5
h) Thread G½" Hygiene adapter
Installation according to instruction manual
Electrical connection
a) M12 connector
b) Function monitoring with antivalence
c) Valve plug
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