Key Facts About Rotameters

Facts About Rotameters | Flowmetrics

Rotameters are very helpful tools for various machines in the industrial industry and beyond. In determining the best option for your needs, it is important to be aware of the factors that contribute to this apparatus. Here are some helpful facts about rotameters that are beneficial to know.


Rotameters Defined

Rotameters are a type of flow meter. As the name indicates, a flow meter measures the flow of gases and liquids through machinery. Such measurements are often essential to maintaining the proper function of many machines. Having too much or too little flow can cause malfunctioning and even destruction of certain machines. That is why apparatuses like rotameters are so important.

A rotameter is composed of three main parts:

  • Flow tube
  • Float
  • Measuring scale

The flow is measured by the gas or liquid lifting the float within the tube. The weight of the float is supported by the force of the fluid moving through the apparatus and provides a reading on the measuring scale.


Advantages of Rotameters

Rotameters are among a few different flow meter options. There are certain advantages that are gained by using this particular apparatus. Rotameters are easy and inexpensive to construct, which results in them being a very cost effective option. They do not require any additional external force outside of the substance that it is measuring, which helps to reduce the chances of misreading. Due to their small design and portability, these flow meters are typically quite versatile and can be utilized in a wide variety of systems. The scale is considered to be approximately linear since the area of the flow passage increases as the float moves up the tube. The flow tube is constructed of clear glass, making it highly resistant to chemical action and thermal shock.


Selecting the Right Meter

There are four characteristics that you should consider to help you determine the right rotameter for your needs:

  1. Specifications: There are certain specifications that differ by rotameter, such as flow rates, valve requirements, pipe diameter, operating pressure, indicating scale-type and fluid temperature.
  2. Media Type: Rotameters may be configured to measure either gas or liquid.
  3. Materials: The tubing and float material can be made of different materials and should be considered when selecting the right rotameter for your particular needs.
  4. Mounting Options: There are different mounting options, including insertion, in-line clamp, in-line flanged and in-line threaded. Whichever option you select, the rotameter should be mounted vertically with the widest end of the tube at the top.

Along with the given characteristics, there are also some rotameters that offer additional features, including microprocessor programming, audible or visual alarms and controller functions. You may not need all of these options, so determine carefully the type of product necessary for the job.


By taking time to understand these facts about rotameters, you can be sure to select and implement the best rotameter for your flow measurement needs. To learn more about these and other options, contact your local provider. Not only can they provide helpful information, but they can also assist with installation and maintenance of the device to ensure the proper function of your machinery as a whole.

Leave a Reply

Your email address will not be published. Required fields are marked *