Good news, we have good promoting price for our plastic rotameter,  glass rotameter and mini metal rotamter.  

These plastic pipeline flow meter is a light weight, anti-corrosive, anti-fragile, non-poison, non-smell, easy to use and install, good looking and high accuracy flow meter.

Working principle and specification

The movable float is fitted in a cone shaped vertical plastic pipeline. It will move when application flow through from bottom to the top. It stays at a position when the float is balance on gravity, buoyancy and viscous forces together, and the current position is stand for the current flowing rate.