Variable Area Flowmeters

Please refer/download catalogues for detailed information


Metal Tube Rotameter

  • Metal tube Rotameters are variable area flowmeters for measuring volumetric flow rates of liquids and Gases.
  • The construction includes a tapered stainless-steel tube.
  • A float with a magnet embedded in it, moves inside a tapered tube.
  • The float is magnetically coupled with an indicating pointer assembly.
  • The float position inside the tube is result of balancing of buoyancy and gravitational force. As flow tube is tapered from inside, gap is created between inside wall of tapered tube and the outer diameter of float and fluid flow passes through it. As the float moves vertically up and down inside the tube, the magnetic coupling moves the indicating pointer assembly which is indicates the flow rate.
  • Eureka Metal Tube Rotameters are also offered with Electrical Transmitter output. Along with Analog output of 4-20 mA, HART communication is also possible.
  • CE/PED approvals and Ex/ATEX versions, are also available for specific requirements.
  • Along with high flow rates, the models are available for measuring very low flow rates upto 1 lph.
  • It is available in various versions which includes
  • Applications: Water/Pharma/Chemical/Fertilizers/Power/Petrochem/Refinery

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    Metal Tube Rotameter MT/MTS series

  • Suitable for small to very high flow rates (typical water flow 100 to 100,000 lph)
  • Available in line size from 1/2” to 6”
  • Analog Display in engineering units
  • Temperature rating: upto 250 Deg. C
  • Pressure rating: Upto 200 bar
  • Flanged or screwed end connections
  • Top/Bottom, Side or Rear mounting style
  • Flow switch for high/low flow (optional)
  • Steam jacket (optional)

  • Metal Tube Rotameter MMT/MMMT series

  • Suitable for very small flow rates (typical water flow 1to 100 lph)
  • Available in line size from 1/4” to 1”
  • Analog Display in engineering units
  • Temperature rating: up to 100 Deg. C
  • Pressure rating: up to 40 bar
  • Flanged or screwed end connections
  • Top/Bottom, Side or Rear mounting style
  • Flow switch for high/low flow (optional)

  • Metal Tube Rotameter (MTF series)

  • MTF series in PTFE construction for corrosive or aggressive fluid service
  • Available in line size from 1/2” to 3”
  • Analog Display in engineering units
  • All wetted parts in PTFE/PTFE lined
  • Temperature rating: upto 100 Deg. C
  • Pressure rating: Up to 20 bar

  • Metal Tube Rotameter with Electrical Transmitter

  • An analog electrical output of 4-20 mA which is proportional to fluid flow rate can be offered in Metal tube Rotameter.
  • A Hall effect sensor senses the position of pair of magnets mounted on shaft assembly.
  • As the analog pointer rotates the output of the Hall effect sensor varies.
  • This output is processed by an electronic circuit to give current output proportional to flow rate.
  • Electrical Transmitter version is available in various versions suitable for applications in safe and hazardous areas.
  • Two wire Loop powered 24 DC supply
  • Output: 4-20 mA
  • HART communication output (Optional)
  • CE / ATEX certifications
  • IP 65 construction as standard