LFK, Flow Switch

LFK, Flow Switch

Series LFK flow sensor utilizes Karman Vortex flow sense technology in an inline flow desgn to measure flow rate.  The LFK is an ideal choice for flow sensing applications in which corrosion resistant wetted flow path materials are required.

  • Wide flow range options: 0.4 - 4 LPM, 1.8 - 20 LPM. 4.0 - 40 LPM
  • Three connection and body sizes available: 3/8", 1/2" 3/4"
  • SMC LQ3 flare and PFA tube stub connections available
  • Small footprint
  • Analog output choices of either 1-5 vdc or 4-20ma
  • Sensor cabling options include M8 Picofast style at the sensor body and flying leads available
Configuration Options
Copy Configuration Number

Product Options

Select Product Options
Select values from the drop down lists or make appropriate selections to configure the part number.
Fluid Range Configuration Status
LQ3 Integral Fitting Configuration Status
Fitting Configuration Status
Output Specification Configuration Status
Connector Configuration Status
Bracket Configuration Status
Options in:
  • Gray are not compatible with other selected option value.
  • Red conflict with another selected option value.
  • Amber are not recommended.


The part number needs to be complete in order to view/download CAD Models.

Model does not exist, please email cad@smcusa.com with the complete part number, CAD file format and version required.

CAD Downloads

Download CAD File

View CAD Models

View 3D Model

Product Catalog

Series Catalog

RoHS Certificate

Download Certificate