Low Flow Inline Rotameter

(1 customer review)



  • Small Inline Tube Variable Area Flow Meter
  • Flow Range: 2.5-25 LPH,   6-60 LPH,  10-100 LPH,  16-160 LPH


Inline Small Tube Rotameter, Low Flow Variable Area Flow Meters

  • Low Flow Tube Rotameter which has been designed to offer an economical solution for liquid flow measurements.
  • Flow Range (LPH: Liter Per Hour):
    • 2.5 to 25 LPH.
    • 6 to 60 LPH.
    • 10 to 100 LPH.
    • 16 to 160 LPH.


  • Connection: 1/2″ BSP Male.
  • Dimensions: 187mm high, 22mm diameter.
  • Body: Acrylic.
  • Fittings: Polypropylene.
  • Float: Plastic (25 LPH)
  • Float & Leader: Stainless Steel (60, 100, 160 LPH)
  • Simple installation, threaded connection.
  • Type: Inline tube, pipe type.
  • Max Working Pressure: 1 MPA / 10 Bar / 145 PSI.
  • Max Working Temperature: 60 C.
  • Light weight, low cost and excellent readability rotameter.
  • Used for industrial and domestic application, Widely used in water treatment & filtration industry, reverse osmosis units.
  • Indoor use only.
  • More sizes and types are available.


  • Measurement Principle: Variable area flow using a float in a tapered tube made from special plastic materials.
  • Operation: The fluid flows up through the tapered tube forcing the float to a position with sufficient free area to enable the flow to pass. This free area is related to the flow rate, the weight of the float and the density and viscosity of the fluid. The pressure drop across the flow meter remains constant over the entire flow range. This occurs because the pressure drop is related to the fluid velocity and area of flow, the area of flow increases as the flow rate increases.

Additional information

Flow Range

2.5 to 25 LPH, 6 to 60 LPH, 10 to 100 LPH, 16 to 160 LPH

1 review for Low Flow Inline Rotameter

  1. Scott McNab (verified owner)

    Perfect for our application, production team said needed this ten years ago. I used to measure flow of water into our production line making apple puree. Depending on the apples used moisture and sugar content is different. They had been using a ball valve and 3/4 hose with basically zero control.
    Now everyone adds precisely the same amount of water depending on QC requirements.
    10/10 Quality, 10/10 Price, 10/10 Delivery time.

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