How to read the flow reading of the glass rotameter?

Eyes are flush. Read the scale on the upper plane of the rotor, starting from the 0 scale direction. The data read on the glass rotameter is the instantaneous flow, either the volume flow or the mass flow. For mass flow, you can first convert it to volume flow (in m3/s), and then divide the volume flow by the cross-sectional area according to the caliber of the rotameter. (Note: This is an estimate because the cross-sectional area is not linear. ) The scale of the glass rotor flowmeter is calibrated by the manufacturer using water and dry air that are close to ideal fluids as the medium under the conditions of the factory. However, there are two situations where the scale value of the glass rotor flowmeter cannot be used directly: one is that the measuring medium is not water and air, and the other is that the measuring medium is water and air, but its state (temperature. pressure) It is different from the scale state. In this way, when using a glass rotameter, in order to obtain a correct measurement result, there is a problem that the scale value needs to be corrected. Therefore, it is the key to make good use of this kind of meter to solve the problem of correcting the scale of glass rotameter.