The rotameter is also called the float meter.Is a variable area flowmeter, in a vertical cone from the bottom up expansion, the circular cross section of the float gravity is borne by the fluid dynamics, the float can freely rise and fall in the cone tube.It moves up and down under the action of velocity and buoyancy. After balancing with the weight of the float, it is transmitted to the dial to indicate the flow rate by magnetic coupling.Generally divided into glass and metal rotameter, float meter.Metal rotameter is commonly used in industry *, for small diameter corrosive medium is usually made of glass material, due to the fragile nature of the glass material itself, the key control point is also useful all titanium material and other precious metals for the material of the rotameter (float meter).

Rotameter is a variable area flow meter based on float position measurement. It is designed with all-metal structure and Modular concept, with small pressure loss, large range ratio (10:1), and convenient installation and maintenance.

The use of rotameters

Rotameter (float meter) reading usually for the pointer reading, there are also liquid crystal reading, pointer reading just read instantaneous flow, liquid crystal there is instantaneous and cumulative flow, if there is an output can also be displayed from the rotameter meter reading.The intersection of the section of the reading rotor and the glass tube engraving line is the flow value.The main difference between orifice flowmeter and rotameter and float flowmeter is as follows: the former is constant section, variable pressure difference;The latter is constant pressure difference, variable cross section

In order to make the rotor flow meter in the centerline of the conical pipe move up and down without touching the wall, usually adopts two methods: one is in the center of the rotor core rod is equipped with a guide, in order to keep the rotor moves up and down in the centerline of the conical pipe, the other is on the edge of the rotor disc has a road chute, when the fluid flows through the rotor from bottom to top, to bypass the rotor side, through the chute to produce a reverse thrust again at the same time, make the rotor revolves around the centerline twirling round and round, it can keep the rotor from touching the wall at work.