The glass rotameter is easy to read and has a wide range of uses

The glass rotameter is an instantaneous flow measuring instrument that is easy to use, convenient to read and has a wide range of uses. In the field of environmental protection equipment and instruments, the amount used is more than 30,000 units per year. Therefore, it is extremely important to choose and use this instrument well.
Types and selection of glass rotameters
The glass rotameter can be divided into eight types according to its use and scope of application: ordinary type, ribbed vascular type, small flow and small shape type, corrosion-resistant type, laboratory type, heat preservation type, alarm type and high-pressure resistance type. series. According to the instrument series spectrum formulated by the country, no matter which series, it includes a total of 12 calibers from 1 mm to 100 mm at most, and the measurable flow range is:
The scale of the glass rotameter is calibrated by the manufacturer under the conditions of the factory using water and dry air which are close to the ideal fluid as the medium. However, in the field where the flowmeter is used, there are two situations in which its scale value cannot be used directly: one is that the measurement medium is not water and air, and the other is that although the medium is water and air, its state (temperature, pressure) and scale The status is different. In this way, when using a flow meter, in order to obtain correct measurement results, there is a problem that the scale value needs to be corrected. Therefore, solving the scale correction of the glass rotameter is the key to using this instrument well.
Considering that the environmental protection instrument uses a large number of rotameters to measure the flow of gas medium, so the following only discusses the density correction when measuring gas medium. Since the viscosity of the gas medium is very small, the influence of viscosity is omitted in the discussion. Practice has shown that this does not affect the corrected accuracy.
The glass rotameter can be seen in many fields of industry due to its simple use and installation, low price and obvious working effect. It is portable and intuitive.