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LFL1-*K-N-***** Float Switch

主要优势一览

  • Switch element: float switch with initiator, mercury-free
  • Electrical connections in acc. with NAMUR for hazardous area
  • Limit value detection for fluids
  • Sleeve design: small diameter, mounting through G1 tap hole possible
  • Ball design: high buoyancy

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Product photo: Float Switch LFL1-*K-N-*****
Product photo: Float Switch LFL1-*K-N-*****
Approval
Product Compliance: Europe – CE
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LFL1-*K-N-***** 技术数据

Construction typeInductive sensor with switching ball
SeriesLFL1-**-N
Rated voltageUr8.2 V ± 2 V
Current consumption< 1.0 mA unswitched (de-energized at the bottom),
> 2.2 mA switched (floated up at the top)
Reverse polarity protectionyes
ConnectionNAMUR acc. to EN 60947-5-6 , 2-wire
Electromagnetic compatibility
Directive 2014/30/EUEN 60947-5-2:2007+A1:2012
Degree of protectionIEC 60529:2001
Equipment architectureA measuring system consists of a float switch LFL1-**-N and a transformer isolated barrier,
e. g. KFD2-SR2-Ex1.W.
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

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 temperature-20 ... 70 °C (-4 ... 158 °F)
Storage temperature-25 ... 70 °C (-13 ... 158 °F)
Altitude≤ 2000 m above MSL
Degree of protectionIP68
EU-type examination certificateTÜV 99 ATEX 1407
MarkingEx-Hexagon II 2G Ex ia IIB T5 Gb
Directive conformity
Directive 2014/34/EUEN 60079-0:2012+A11:2013 , EN 60079-11:2012
Materialfloat: PP (Polypropylene)
cable:
- PVC version: PVC cable, highly flexible (2 x 0.75 mm2)
- PUR version: PUR cable, highly flexible (2 x 0.50 mm2)
- CSM/CM version: CSM/CM cable (chlorinated polyethylene, (2 x 0.75 mm2))
Switching pointswitch angle, measured against the horizontal:
- upper switch point +15° ±5°
- lower switch point -15° ±5°
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals 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
一般说明
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