Glass Tube Rotameter

Glass Tube Rotameter

Veksler Instruments

Veksler Instruments offers Glass Tube Rotameter. Glass Tube Rotameter consists of a tapered glass tube mounted vertically in a frame with the small diameter at the bottom and large end up. The tube contains a free moving float that rests on the stopper at the base of the tube. When the liquid flows, the float rises until its weight is balanced by the up thrust of the fluid and the float reaches a position of equilibrium. At this position it indicates the instantaneous rate of flow. The flow rate can be read from the adjacent scale. The pressure drop across the float is equal to its weight divided by its maximum cross-sectional area in the horizontal plane. Both in orifice type meter and in the Rotameter, the pressure drop arises from the conversion of pressure energy to kinetic energy and from the frictional losses. Thus Rotameter may be considered as an orifice meter with a variable aperture and the formula derived for the orifice meter is applicable here with only minor changes. 


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  • Accuracy +/ -2% of full scale
  • Rangeability 10: 1
  • Repeatability 0.5%
  • Overall length of 500 mm in flanged versions
  • End connections can be rotated through 360 Deg
  • Connection orientation
  • Top & Bottom, rear, bottom and rear, rear and top
  • Tube can be changed on line
  • Detachable scale with flow in customers engineering units
  • Scale length 175-200 mm
  • Standard interchangeable floats for a given size
  • Adjustable packing gland
  • Wide choice of flow ranges for individual requirement
  • Sturdy metallic const. to withstand line stress & vibration
  • 1/2" to 4" Line size and max flow upto 30000
  • Optional high and low alarms

Products from Veksler Instruments

Magnetic Level Indicators Magnetic Level Indicators
Metal Tube Rotameter Metal Tube Rotameter
Industrial Grade Manometers Industrial Grade Manometers

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