Variable Area Flow Meters


These flowmeters operate according to the variable area principle, where a float is suspended in upward flowing
media in a tapered plastic tube. The vertical position of the float within the metering tube
depends on the flowrate of the media.

The measuring range is usually 1:10 where the scale is
uniformly graded on the measuring tube. The measured value is determined by the upper edge of
the float and can be easily read on the scale.

The rotameter is suitable for liquids and gases and
it provides a cost effective solution for flow measurement in l/h, Nm³/h, %, or other units.
On request double scales are also available, such as l/h and %.


Metering tubes are available in Trogamid (PA), suitable for inert media, PVC and Polysulfone (PSU) suitable for many corrosive media. Male threads moulded onto the end of the metering tube are used for easy mounting of unions. Standard unions are in PVC-U but others are available according to the different working conditions.

The floats are available in Stainless Steel 1.4571 (AISI 316 Ti) and PP depending on flow medium and measuring range.

All the flowmeters are equipped with min-max visual flow indicators fully adjustable. In addition, the flowmeters can be fitted with min-max flow switches or measuring sensor. When fitting the electrical accessories, a float with magnet must be installed in the flowmeter.