LFE Digital flow switch

LFE Digital electromagnetic flow switch for water and water-soluble refrigerant
Measuring range Up to 200 l/min
Process temperature 0...+85°C
Process pressure 0...10 bar
Signal output 4...20 mA - NPN

The LFE electromagnetic flowmeter measures the volumetric flow rate of inductive liquids by applying Faraday's law of induction: "When a conductive object is moved through a magnetic field, an electromotive force is generated". The electromotive force is proportional to the velocity of the fluid multiplied by the density of the magnetic flux. The volume flow is calculated by converting the measured electromotive force. An oval fluid passage is used to improve the magnetic flux density generated by small amounts of current. Application examples: Flow control for pressurized cooling water for welding guns; Flow control for water-soluble coolant; Flow control for cooling water for metal molds. The main features that distinguish the LFE flow sensor are: Compact dimensions; the possibility of detecting the reverse flow; flow direction can be changed after installation; it is possible to set the adjustment value, the accumulated value, the name of the line, the maximum / minimum value; The 3-color display can be reset; low pressure drop. Max 0.02 MPa. This product cannot be used for fluids that do not conduct electricity, such as deionized water (distilled water) and oil.

The LFE electromagnetic flowmeter measures the volumetric flow rate of inductive liquids by applying Faraday's law of induction: "When a conductive object is moved through a magnetic field, an electromotive force is generated". The electromotive force is proportional to the velocity of the fluid multiplied by the density of the magnetic flux. The volume flow is calculated by converting the measured electromotive force. An oval fluid passage is used to improve the magnetic flux density generated by small amounts of current.



Application examples:

  • Flow control for pressurized cooling water for welding pliers;
  • Flow control for water-soluble coolant;
  • Flow control for cooling water for metal molds.



The main features that distinguish the LFE flow sensor are:

  • The compact size;
  • the possibility of detecting the reverse flow;
  • flow direction can be changed after installation;
  • it is possible to set the adjustment value, the accumulated value, the name of the line, the maximum / minimum value;
  • The 3-color display can be reset;
  • low pressure drop. Max 0.02 MPa.


This product cannot be used for fluids that do not conduct electricity, such as deionized water (distilled water) and oil.

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