We specialise in the design, manufacturing and supply of a wide range of flow meters here at Litre Meter, stocking applications suitable for all kinds of materials and job specifications.
As all fluids have different characteristics, some are better suited to certain flow meters than others. Finding the best flow meter for the job is influenced by the flow’s properties; its given pressure, temperature, temperature, density, conductivity and composition, for example.
Our wide selection offers a number of applications that are suited to measuring viscous media, designed to avoid common problems of high viscosity materials like sticking to surfaces. When it starts to stick, this causes the movement of the liquid to slow down and become inconsistent, leading to inaccurate readings.
However, there are certain types of flow technology that aid the movement of the liquid, including:
Rotary piston meter
Also known as positive displacement flow meters, rotary piston meters measure volumes of fluid by counting known fixed volumes repeatedly as a fluid goes in and out of the meter’s chamber.
It does this using an oscillating piston which divides the chamber into compartments containing an exact volume, making it easy for volumes to be monitored and measured accurately and efficiently. When more fluid is flowing, it turns faster.
This particular flow measurement application can be used for most fluids, as well as certain materials with high viscosity, including certain foods and butyl rubber.
Using an oscillatory motion, vortex shedding detects provoked vortices made from the fluid in the meter to measure its velocity and rate, providing accurate readings for both low and high viscosity liquids.
Vortex shedding induces fluctuations that create the vortices using the fluid’s own properties – for example, its pressure, density and viscosity. It’s with these vortices that the meter can calculate the volumetric flow rate.
Known as one of the best flow meters to measure water, vortex shedding is also suitable for accurately measuring other condensates that range in viscosity.
Using the flow’s movement, a helical screw flow meter’s screws and gears rotate as the fluid goes through the meter.
Inside a helical screw flow meter has two counter rotating gears that form a continuous constant volume cavity. This means that the flow rate of a fluid can be determined by the known volume within the cavity per revolution.
Because very little force is needed to rotate the gears, helical screw applications are suited to fluids with a high viscosity.