GEMU Model 800 Flow Meter


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


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: 3/4″, 1″, 1-1/4″, 1-1/2″, 2″, 2-1/2″

Body Configuration: Straight through

Connection Types: 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

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 Pressure: Tubes with metal unions: max. 15 bar, Tubes with plastic unions: max. 10 bar