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  6. LFL3-**-U

Archived Product Version

LFL3-**-U Float Switch

Key Benefits at a Glance

  • Switch element: mercury (Hg)
  • Limit value detection for fluids
  • Sleeve design: small diameter, mounting through G1 tap hole possible
  • Ball design: high buoyancy
Please contact us for exact delivery estimation.
Product photo: Float Switch LFL3-**-U
Product photo: Float Switch LFL3-**-U
Product Compliance: Europe – CE
Note

All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

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DatasheetFunctionClassificationProduct DocumentationDesign / SimulationApprovals

Technical data of LFL3-**-U

SeriesLFL3-**-U
Contact loading230 V AC/3 A/200 VA; 150 V DC/3 A/100 W resistive load
Rated insulation voltage300 V
Pulse withstand voltage4 kV
Low voltage
Directive 2014/35/EUEN 60947-5-1:2004 + Cor.:2005 + A1:2009
Degree of protectionIEC 60529:2001
Descriptionmercury (Hg) change-over contact
Equipment architectureThis device may be used with any sequential circuit, as long as the circuit can support the electrical circuit values of the switching elements.
Installation conditions
Installation instructionsrange of application and minimum length between mounting and float:
- PVC version: ≥ 50 mm (2 inch), preferred for water
- PUR version: ≥ 100 mm (4 inch), preferred for fuels, heating oils, oily fluids
- CSM/CM version: ≥ 100 mm (4 inch), preferred for many acids and lyes
- TPK version: ≥ 100 mm (4 inch), preferred for many acids and lyes

mounting:
- The float switch is mounted either from sidewards through a cable gland ≥ G1A into the vessel or
- by means of a counter weight or rods (e. g. float switch combination) from the top.
The pivot of the cable should always be horizontal.
Process conditions
Process pressure (static pressure)sleeve design: ≤ 3 bar at 20 °C (68 °F)
ball design: ≤ 2 bar at 20 °C (68 °F)
Densitysleeve design: ≥ 0.8 g/cm3
ball design: ≥ 0.6 g/cm3
Ambient temperaturePVC version: 5 ... 70 °C (41 ... 158 °F)
PUR version: 5 ... 70 °C (41 ... 158 °F)
CSM/CM version: -20 ... 70 °C (-4 ... 158 °F)
TPK version: 5 ... 70 °C (41 ... 158 °F)
Storage temperature-25 ... 70 °C (-13 ... 158 °F)
Altitude≤ 2000 m above MSL
Degree of protectionIP68
Materialfloat: PP (Polypropylene)
cable:
- PVC version: PVC cable, highly flexible (3 x 0.75 mm2)
- PUR version: PUR cable, highly flexible (3 x 0.50 mm2)
- CSM/CM version: CSM/CM cable (chlorinated polyethylene, (3 x 0.75 mm2))
- TPK version: TPK cable, (3 x 0.75 mm2)
Switching pointswitch angle, measured against the horizontal:
- upper switch point +15° ±5°
- lower switch point -15° ±5°
Supplementary informationStatement of Conformity, Declaration of Conformity, Attestation of Conformity and instructions have to be observed where applicable. For information see www.pepperl-fuchs.com.
Designation- LFL-Z231, counter nut, G1A, PVC
- LFL-Z32, counter weight, grey cast iron with plastic coating (Polycarbonate)
- LFL-Z33, counter weight, grey cast iron with ECTFE coating (Halar)
- LFL-Z131, gland screw connection G1A, PVC
- LFL-Z132, gland screw connection G1A, brass
- LFL-Z161, gland screw connection G2A, PVC
- LFL-Z431, gland screw connection 1 NPT, PVC
- LFL-Z461, gland screw connection 2 NPT, PVC
General Notes

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