Rotameter and view glass are two different types of flow measurement instruments commonly used in industrial and laboratory applications. Rotameter, also known as a variable area flowmeter, is a device that measures the flow rate of a fluid by using a float inside a tapered tube.

The float moves up or down based on the flow rate, and the position of the float indicates the flow rate on a scale located on the outside of the tube. Rotameters are commonly used for measuring low to medium flow rates of liquids and gasses in a wide range of applications, including chemical processing, water treatment, and food and beverage production.

View glass, also known as sight glass or visual flow indicator, is a transparent or translucent window that allows the user to visually inspect the flow of fluid in a pipeline or vessel.

View glasses are typically made of glass, plastic, or metal, and can be installed in a variety of orientations such as vertical, horizontal, or at an angle. They are commonly used in industries such as pharmaceuticals, food and beverage, and oil and gas, where visual inspection of fluid flow is important for quality control and process monitoring.

Advantages

1.  Chemical processing: for measuring the flow rate of chemicals and other fluids Water treatment: for measuring the flow rate of water and wastewater in treatment plants
2.  HVAC systems: for measuring the flow rate of air and water in heating, ventilation, and air conditioning systems Pharmaceutical industry: for measuring the flow rate of liquids and gases in the production of pharmaceuticals
3.  Food and beverage industry: for measuring the flow rate of liquids and gases in the production of food and beverages Oil and gas industry: for measuring the flow rate of fluids in pipelines, refineries, and drilling operations
4.  Research and development: for measuring the flow rate of fluids in laboratory experiments and research studies