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  • Large selection of measuring ranges
  • Anti-static metering tubes
  • High accuracy of free rotating float even at low flow rates
  • Low pressure loss
  • 16 bar max pressure
  • Visual check of the medium
  • Non-powered local indication
  • Large selection of scales
  • Optional built-in valve


The Yokogawa RAGL 41 Rotameter is designed for measurement of liquids and gases. The conical glass metering tube has a free rotating float. This float is mounted in a vertical pipeline with flow direction upwards. The flow is indicated by the top of the float and can be read from the standard scale on the metering tube or from a connected scale.

Measurable flow rates:

  • Water 68°F (20°C); 0.002 l/h bis 110 l/h
  • Air 68°F (20°C; 1 bar abs.): 0.1 l/h bis 3 500 l/h

Measuring range:

  • K metering tube; 10:1
  • M metering tube; 20:1 (10:1)
  • L metering tube; 20:1

Max. Temperature:

  • Fitting material SS; 212°F (100°C)
  • With option /MV; 266°F (130°C) (not for PP-Rotameter)
  • Fitting material PP; 176°F (80°C)