Rotameters - Variable Area Flowmeter

ROTAMETERs™ (Variable Area Meters) are named after ROTA, one of the European inventors of this flow principle in the beginning of the century. ROTA invented the rotating float, which is self-guiding and has less friction in the pipe so that a more precise measurement is possible.

Rota Yokogawa is one of the main suppliers of ROTAMETERs™ in Europe. Globally ROTAMETER™ is available with metering tubes manufactured from either glass, plastic or metal.

Our ROTAMETER™ family includes units 6mm to 125mm line sizes, temperatures from -180 to +400ºC, flange ratings to 1500#, ±1.6% accuracy class and turndown's of 10:1. ROTAMETERs™ offer a very low cost, easy to install solution to flow measurement.

Once considered as only a water or air flowmeter, ROTAMETER™ is now world proven in applications such as industrial gases, viscous/non conductive chemicals, steam and fuels.

Metal, Glass, and Plastic Rotameters

RAMC and RAKD Metal Rotameters

RAMC and RAKD Metal Rotameters

The RAMC short-stroke Rotameter allows the measurement of high flow rates using a relatively short metering tube. It is a stainless steel armored construction for the safe measurement of a variety of liquids, gas and steam.

It’s special application is for hazardous, dangerous or aggressive fluids, for high temperatures and high pressure rates. The RAKD short-tube mini Rotameter is used for measurements of low flow rates of liquids and gases. Its special application is in troubled, opaque or aggressive mediums and under high pressure.

RAGG Housing Rotameter

RAGG Housing Rotameter
The RAGG Rotameter glass-housed is designed for measurement of liquids and gases. The conical glass metering tube has a free rotating float. Measureable Flow Rate: Water = 1.6l/h to 10 m3/h; Air = 25 l/h to 250 m3/h

RAGH Tube Rotameter

RAGH Tube Rotameter
The Tube Rotameter RAGH is designed for measurement of liquids and gases. The conical glass metering tube has a free rotating float. Measureable Flow Rate: Water = 0.002 l/h to 10 m3/h; Air = 0.1 l/h to 210 m3/h

RAGK Mini Rotameter

RAGK Mini Rotameter
Thie Mini Rotameter RAGK is designed for measurement of liquids and gases. The conical glass metering tube has a free rotating float. Measureable Flow Rate: Water = 0.002 l/h to 600 l/h; Air = 0.2 l/h to 6300 l/h

RAGL Laboratory Rotameter

RAGL Laboratory Rotameter
The Laboratory Rotameter RAGL is designed for measurement of liquids and gases. The conical glass metering tube has a free rotating float. Measureable Flow Rate: Water = 0.002 l/h to 110 l/h; Air = 0.1 l/h to 3500 l/h

RAQN Plastic Rotameter

RAQN Plastic Rotameter
The Plastic Rotameter RAQN is designed for measurement of liquids and gases. The conical plastic metering tube has a free rotating float. Measureable Flow Rate: Water = 10 l/h to 10 m3/h; Air = 0.16 m3/h to 250 m3/h