The flowmeter operates according to the variable area principle. Metering tubes are available in Trogamid-T, suitable for inert media, and polysulfone, suitable for corrosive media (PVC and PVDF tubes on request). Male threads moulded onto the ends of the metering tube allow for easy mounting of unions. O-ring seals at the faces of the tube ensure reliable sealing between metering tube and union and provide stress-free sealing. The floats are available in stainless steel 1.4571, PP or PVDF (depending on flow medium and measuring range). The scale on the metering tube can be suited to the medium and is available e.g. in l/h, m3/h or %. Dovetail sections moulded onto the metering tube allow for easy mounting of adjustable visual flow indicators, limit switches and a continuous readout transmitter.

  • Good level of accuracy, simple operation
  • Impact resistant, corrosion resistant
  • Over 500 standard scales and 13.000 special scales are available with further scales on request
  • Clear and large size printed scale


Note Please click "Magnifying Glass" next to the attributes listed below to view helpful information to specify desire "Tube Size" and "Measuring Range".
Float Material/Working Medium PP (Gases) PP (Liquids and gases) PP with magnet (Gases) PP with magnet (Liquids and gases) PVDF (Liquids and gases) PVDF with magnet (Liquids and gases) Stainless steel 1.4571 (Liquids ) Stainless steel 1.4571 with magnet (Liquids)
Nominal Size DN 20 DN 25 DN 32 DN 40 DN 50 DN 65
Body Configuration Straight through
Connection Union ends with DIN insert (IR butt welding) Union ends with DIN insert (socket) Union ends with inch insert (socket)
Tube Material Polysulfone (temperature range 0 to 100°C) PVC PVDF Trogamid -T (temperature range 0 to 60°C)
O-Ring Material EPDM FPM
Union Material GT Malleable iron PP PVC-U PVDF Stainless steel 1.4571
Tube Size
46 47 48 49 52 53 54 55 61 62 63 67 68 69 71 72 73 75 77
Working Medium Inert and corrosive liquid and gaseous media which have no negative impact on the physical and chemical properties of the tube, float, seal and union materials.
Operating Pressure1 Tubes with metal unions: max. 15 barTubes with plastic unions: max. 10 bar

Required Information

N/A The following data are necessary:

  1. Type of Medium
  2. Concentration of Medium (%)
  3. Required Flow Range (l/h, m3/h, kg/h)
  4. Operating Pressure, Relative or Absolute (bar)
  5. Temperature of Medium (°C)
  6. Viscosity of Medium (if available)
  7. Medium Density (if available)
  8. Float With or Without Magnet

  • 1 Operating pressure dependent on tube material and operating temperature.