What is the working principle of rotameter?

Working principle of rotameters It consists of a tapered tube; as fluid passes through that tube, it raises the float. Greater volumetric flow exerts more pressure on the float, lifting it higher.

How many types of rotameter are there?

Chapter 2: Types of Rotameters. Rotameters can be used in a variety of applications and each of the instruments has unique elements which meet these different applications. The types of rotameters include the glass tube flow meters, armored purge meter, and the flanged armored rotameter.

What is the accuracy of the rotameter?

Even in the most demanding applications — measuring gases, liquids or steam — rotameters can deliver 2% full-scale accuracy.

What is the application of rotameter?

The main application of the rotameter flow meter is to measure the flowrate of liquids and gases. It is composed of a plastic, metal or glass tube and float. The float response to flowrate changes is linear, and a 10-to-1 flow range or turndown is standard.

What are the advantages of rotameter?

Advantages of rotameter

  • Low cost.
  • Low pressure drop.
  • Rangeability is better.
  • It is suitable for small flow rates.
  • It is easily equipped with alarms and switches or any transmitting devices.
  • It also measures the flow rate of corrosive fluids.
  • There is an availability of viscosity-immune floats.

How is flow rate measured?

Flow is the volume of fluid that passes in a unit of time. In water resources, flow is often measured in units of cubic feet per second (cfs), cubic meters per second (cms), gallons per minute (gpm), or other various units.

What is calibration of rotameter?

A rotameter is typically designed for one specific gas density and flow range, so without the rotameter being calibrated to those conditions, accuracy will suffer. Calibrating a rotameter will identify the reference conditions in which the rotameter will be used, thus offering the most precise measurements.

What are the applications of rotameter?

The applications of rotameter include the following.

  • Rotameters are used in different industries.
  • These are used where there is a quality air supply is required.
  • This is used where low pressure is necessary.
  • Used in laboratories.
  • Process and oil industries.
  • Used in the medical field for measurement of oxygen flow rate.

What are rotameters used for?

A rotameter (variable area meter) is a flow meter that measures volumetric flow of liquids and gases. There is no difference between a rotameter and flow meter, and these terms are used interchangeably. The technique for measuring flow is accomplished by a freely moving float finding equilibrium in a tapered tube.

What are the limitations of rotameter?

Disadvantages of rotameter:

  • It is difficult to handle the glass tube type.
  • It must be mounted vertically.
  • It is not suitable for pulsating services.
  • Generally it is limited to small pipe services.
  • It is limited to low temperatures.
  • Accuracy is = ± 1/2 to 10%.
  • It requires in-line mounting.