To read a rotameter, look at the position of the float inside the tube. The flow rate is indicated on the scale where the float is positioned. The number on the scale closest to the center of the float is the flow rate being measured.
Rotameter
The float in rotameter is lifted by the liquid. Rotameter is calibrated for particular liquid or gas with its exact density. if we mount it horizontally float will not come to its original place.
It is used to measure the rate of flow of liquid & glasses
A rotameter is a type of device that is used to measure the flow rate that a liquid or gas will produce inside a closed tube. The fluid will move in a random direction depending on how it is turned due to gravity.
calibration curve helps you determine the value of a unknown substance
to create annular area so that the diff. pressure can be kept constant.
what is the proper procedures for cheking and adjusting the needle valve
A Rotameter is a device that measures the flow rate of liquid or gas in a closed tube. It is occasionally misspelled as "rotometer." It belongs to a class of meters called variable area meters, which measure flow rate by allowing the cross-sectional area the fluid travels through to vary, causing some measurable effect.
so that there is a linear relationship between the flow rate and position in the float within the tube.
Read it!
The present perfect tense for "read" is "has/have read."
Wanted to read is the past tense of wants to read.