Tubux M30

Universal float-type flow meter with glass measuring cone

Tubux M30-type flow meters are suitable for measuring clear liquids and gases. In the Tubux M30’s structural design, the glass measuring cone is protected by a stainless steel pipe with an integrated window. The uniform structure permits various standard-compliant connection concepts.

For more demanding applications, devices can also be equipped with one or more contact switches. On request, percentage or 2 mm scales are available for these device types.

The image shows a glass version of a float-type flow meter

Areas of application:

The Tubux M30-series float-type flow meters are used to measure the volume of clear liquid and gas flows in closed pipelines. Optionally, the devices can also be used for flow monitoring if they are equipped with one or more contact switches. Standard scales are offered for liquids with a density of 1 kg/l. The scales are converted based on the medium to be measured for all other measurement media.

The Tubux M30 float-type flow meter is used in the following industries:

  • Plant and mechanical engineering
  • Building services equipment
  • Water and wastewater

Advantages of the Tubux M30 mechanical flow meter:

  • Reliability (long-term stability, service life)
  • Can be used for liquids and gas (clear)
  • Measurement media temperatures: -10 °C to +150 °C
  • Precision ,.0 % of the measurement per VDI/VDE 3513-2 (qG = 50 %) - optional
  • Measurement range limit for liquid: 0.1 l/h to 25,000 l/h (water: +20 °C)
  • Measurement range limit for gas: 1 l/h to 480,000 l/h (air: +20 °C, 1.013 bar)
  • Flange, threaded or hose connection
  • Stainless steel fittings (other materials available optionally)
  • Suitable for explosive environments (ATEX)
  • Simple design, making it easy to install and maintain
  • No auxiliary power required for local display
  • Simple interpretation of measurements
  • High repeat accuracy of the measurements
  • Simple commissioning
  • Low cost and simple measuring principle without auxiliary power
  • No calming section
  • Manufacturer’s application expertise
  • Short lead times

Measuring tube connections:

  • Threaded fitting, G¼ to G2
  • Flange connection, DN 10 – DN 80 / ½"- 3"
  • Hose connector, ⅜" - 2" (ID 10 - 50 mm)
Measuring ranges Liquids¹: 0,1 - 25,000 l/h
Gases²: 1,0 - 480,000 l/h
Measuring accuracy
acc. to VDI / VDE 3513-2
(qG = 50 %)
Liquids: 1,6
Gases: 2,5
Pressure limits max. 10 bar
Temperature limits -10° C to +150 °C
Flow direction vertically upwards
Float materials Stainless steel,PVC, PVDF, aluminum
Process connections DIN ISO 228: G ¼ – G 2
ANSI B1.20.1: NPT ¼“ – NPT 2“
Adhesive bushing: 20 – 63 mm
Hose: 10 – 50 mm
DIN 2501: DN 10 – DN 80
ANSI B16.5: ½“ – 3“
Options Contact(s), Shatter protection, ATEX version

¹ Standard measurement range for liquids (ρ = 1 kg/l, viscosity 1 mPa.s)

² Standard measurement range for gases (Pe = 0 bar pressure, T = 0 °C, ρ = 1,293 kg/m³, v = 0,0181 mPa.s)

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Michael Jüch
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MECON GmbH
Röntgenstraße 105
50169 Kerpen


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