Features of Glass Tube Rotameter:

　　Linearity: The flow (volume) through the Glass Tube Rotameter is basically proportional to the area. Therefore, most of these flowmeters have the same scale. A typical indicating rotameter scale line is not linear, about 5%.

　　Pressure difference: An important feature of the Glass Tube Rotameter is that the pressure loss through the float is constant. Due to the friction loss through the accessories, the total difference of the meter will increase at higher flow rates.

　　Accuracy: The most common accuracy is ±2% of full-scale reading. With separate calibration and the length of the scale, this will increase greatly. Excellent repeatability

　　Capacity: The Glass Tube Rotameter is the most common method for measuring low flow rates. Large-scale production capacity ranges from 0.5 cm3/min of water to 30 cm3 standard/min. The smallest unit of air volume exceeds 1200 liters/min of water and 1700 cubic meters/hour of air, with a height of 8 cm.

　　Minimum piping requirements: Generally, the area meter can be installed without considering the connection or length of the straight pipe program or following the meter.

　　Corrosive or difficult to handle liquids: these can usually be managed successfully in an area meter. They include materials such as oil, tar, coolant, sulfuric acid, black liquor, beverages, aqua regia, and molten sulfur.

　　Pressure drop: By placing a very light float on a larger pressure gauge, the flow rate can be controlled by a very low-pressure loss (usually 2.5 cm water column or less) and a flow rate of 10:1

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