Liquiphant 31 - Liquid level switch



Point level switch for liquids

Liquiphant FTL31 [replaces FTL20 and FTL260]

from $155.-
Payment on invoice or with
  • Maestro
  • MasterCard
  • Visa
Need help?

Info-Hotline
888-343-4732

    • Robust stainless steel housing (316L)

    • External function test with test magnet

    • Onsite function check possible thanks to LED display

     

    Specs at a glance

    Function Point level switch
    Product Liquids
    Mounting Vessels and pipes from DN25
    Product density >0.7 g/cm³ (>0.5 g/cm³ as option)
    Product temperature –40 to +100 °C (–40 to +212 °F)/ +150 °C (+302 °F)
    Product viscosity ≤10 000 mm2/s (cSt)
    Process pressure Max. 40 bar (580 psi)

    Point level switch Liquiphant FTL31

    Product / VersionPrice / pcs. in USDOrder code
    Power Supply; OutputSensor TypeSensor DesignProcess Connection1 to 34 to 1011+
    20-253VAC/DC; 2-wireCompact version 316L Ra<3.2um/126uinMax. process temperature 100oC/212oFASME MNPT / ISO, 1/2 / 3/4176.-164.-155.- FTL31-xx1V2AAxxx
    Thread ASME MNPT1, 316L195.-182.-172.- FTL31-xx1V2AAVCJ
    Max. process temperature 150oC/302oFASME MNPT / ISO, 1/2 / 3/4206.-192.-182.- FTL31-xx1V3AAxxx
    Thread ASME MNPT1, 316L225.-209.-198.- FTL31-xx1V3AAVCJ
    Short tube version 316L Ra<3.2um/126uinMax. process temperature 100oC/212oFASME MNPT / ISO, 1/2 / 3/4199.-185.-175.- FTL31-xx1V2BAxxx
    Thread ASME MNPT1, 316L218.-203.-192.- FTL31-xx1V2BAVCJ
    Max. process temperature 150oC/302oFASME MNPT / ISO, 1/2 / 3/4229.-213.-202.- FTL31-xx1V3BAxxx
    Thread ASME MNPT1, 316L248.-231.-218.- FTL31-xx1V3BAVCJ
    10-30VDC; 3-wire PNPCompact version 316L Ra<3.2um/126uinMax. process temperature 100oC/212oFASME MNPT / ISO, 1/2 / 3/4176.-164.-155.- FTL31-xx4x2AAxxx
    Thread ASME MNPT1, 316L195.-182.-172.- FTL31-xx4x2AAVCJ
    Max. process temperature 150oC/302oFASME MNPT / ISO, 1/2 / 3/4206.-192.-182.- FTL31-xx4x3AAxxx
    Thread ASME MNPT1, 316L225.-209.-198.- FTL31-xx4x3AAVCJ
    Short tube version 316L Ra<3.2um/126uinMax. process temperature 100oC/212oFASME MNPT / ISO, 1/2 / 3/4199.-185.-175.- FTL31-xx4x2BAxxx
    Thread ASME MNPT1, 316L218.-203.-192.- FTL31-xx4x2BAVCJ
    Max. process temperature 150oC/302oFASME MNPT / ISO, 1/2 / 3/4229.-213.-202.- FTL31-xx4x3BAxxx
    Thread ASME MNPT1, 316L248.-231.-218.- FTL31-xx4x3BAVCJ

    Accessories

    Product / VersionPrice / pcs. in USDOrder code
    Cable 4x0.34, box M12,Cu Sn/Ni,90o,L=5m12.26 52010285
    Socket for plug 4p-125V, 4A-M1216.58 52006263
    Test magnet9.26 71267011

    Prices valid until 31.08.2017 in USD per unit (not including shipping and applicable sales tax). See
    Endress+Hauser Terms and Conditions

  • Application

    The Liquiphant FTL31 is a point level switch for liquids and is used in tanks, vessels and pipes. 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.

    Function

    A piezoelectric drive causes the tuning fork of the liquid level switch 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.

    Application Example

    Point Level switch for liquids Liquiphant FTL31 - Installation example

    The point level switch can be installed in any position in a vessel, pipe or tank, e.g., as overfill prevention or upper level detection (1), lower level detection (2) or dry running protection for pump (3)

  • Technical Data

    DC-PNP version
    Supply voltage 10 to 30 V DC, 3-wire
    Switching capacity 200 mA
    Current consumption <15 mA
    Electrical connection M12 connector, valve plug, cable
    AC/DC-version
    Supply voltage 20 to 253 V AC/DC, 2-wire
    Switching capacity 250 mA
    Current consumption <3.8 mA (in cut-off torque <1 mA for 100 ms)
    Electrical connection Valve plug, cable
    Output general
    Switching delay

    0.5 s when tuning fork is covered

    1.0 s when tuning fork is uncovered

    Hysteresis max. 3 mm (0.12 in)
    Process connections

    Thread ISO 228 G¾" ; G¾";

    Thread ASME MNPT ½"; ¾"; 1";

    Operating conditions
    Orientation As required
    Switch point

    Vertical installation: 13 mm (0.51 in) ±1 mm

    horizontal installation: 10.5 mm (0.4) (water +25 °C (+77 °F), 1 bar (14.5 psi))

    Pipe extension 103 mm (4.05)
    Surface roughness Metallic surface in contact with process: Ra ≤ 3.2 μm (126 μin)
    Ambient temperature –40 to +70 °C (–40 to +158 °F)
    Process temperature

    –40 to +100 °C (–40 to +212 °F),

    optionally to 150 °C (to +302 °F)

    Process pressure –1 to +40 bar (–14.5 to +580 psi)
    Storage temperature –40 to +85 °C (–40 to +185 °F)
    Climate class DIN EN 60068-2-38/IEC 68-2-38: test Z/AD
    Density >0.7 g/cm³ (optionally available: >0.5 g/cm³)
    Viscosity 1 to 10 000 mPa·s, dynamic viscosity
    Degree of protection

    IP65/67 NEMA Type 4X Enclosure (M12 connector);

    IP65 NEMA Type 4X Enclosure (valve plug);

    IP66/68 NEMA Type 4X/6P Enclosure (cable)

    Electromagnetic compatibility Electromagnetic compatibility in accordance with all relevant requirements of the EN 61326 series and NAMUR recommendation EMC (NE21). For details, refer to the EC Declaration of Conformity.

    Dimensions in mm (inches)

    Compact version 

    Liquiphant 31 - Liquid level switch - Dimensions of the compact version

    a) Thread ISO 228 G½"; G¾"

    b) Thread ASME MNPT½"; MNPT¾"

    c) Thread ASME MNPT1"

     

    * Dimension for process temperature max. 100 °C (212 °F)

    ** Dimension for process temperature max. 150 °C (302 °F)

    Installation according to instruction manual

    Short tube version

    Liquiphant 31 - Liquid level switch - Dimensions of the short tube version

    a) Thread ISO 228 G½"; G¾"

    b) Thread ASME MNPT½"; MNPT¾"

    c) Thread ASME MNPT1"

     

    * Dimension for process temperature max. 100 °C (212 °F)

    ** Dimension for process temperature max. 150 °C (302 °F)

    Installation according to instruction manual

    Electrical connection

    Electronic version 3-wire DC PNP

    Point Level switch for liquids Liquiphant FTL31 - Wiring the 3 wire version

    a) M12 connector

    b) Valve plug

    c) Cable

    Electronic version 2-wire AC/DC

    Point Level switch for liquids Liquiphant FTL31 - Wiring the 2 wire version

    a) Valve plug

    b) Cable
     

    Approvals
     CSA C/US General Purpose
  • More documents for FTL31
  • Price / pcs. in USD
    Liquiphant T FTL201 to 34 to 1011+Liquiphant FTL31
    FTL20-0025176.-164.-155.- FTL31-AA4M2AAWBJ
    FTL20-002D206.-192.-182.- FTL31-AA4M3AAWBJ