Flow meters

The flow meter is a device for gas and liquid flow measurement (by volume or by weight). Measurement of a liquid quantity in a closed pipeline is applied most in industrial practice for liquid flow monitoring, proper batching, and energy consumption evaluation. So applications can be found in any type of industry business, including food, chemical, heavy or health-care industries. In our case, we offer volumetric flow measurement based on induction or oval-gear flow principles. Both variants may include compact meters or those with separated evaluating electronic units, or with/without a display.

Induction flow meters

Induction flow meters work on the principle of Faraday's electromagnetic induction law. The velocity of a liquid flow represented by the movement of the conductor induces a voltage in a homogeneous magnetic field. Practically, this means that the medium measured in this way must have a minimum conductivity at least (essential minimum specific conductivity) so that the voltage proportional to the flow can be induced across the electrodes of the meter.

There are distinct advantages such as nearly zero pressure losses, measurement of very aggressive and strongly contaminated liquids, high invariability and metrology measurement stability, not affected by pressure, temperature, viscosity or by solids.

Thanks to the above, the meters are used in batching processes which can be for low volume rapid batches with the accuracy up to 0.2% and for high volumes as well as simple gauging devices with pulse outputs or complex systems with complete control adapted to working with gloves, including ambient interference elimination with their own active valve control.

Flow meters with oval gears

The measurement takes place using two involute gears. The gears are set in motion by the flowing medium and the material is dragged along the walls. In this manner, it is possible to transfer four volumes during one revolution. For instance, the operation of counters in petrol stations is based on this principle.

The advantage consists in the simplicity of construction, accuracy and a wide choice of materials for various media, including non-conductive materials among others e.g. in petrochemical industry or possibly for batching.

Highly accurate mechanical meters with oval gears made by Macnaught, an Australian manufacturer, supplying to more than 60 counties worldwide, for measurement of clean fluids such as fuels, oils, distilled beverages, alcohol, etc. in demanding technological industrial processes. Constructionally suitable for a gravity device, but also for high pressure systems. The meters are supplied with a pulse output signal, 4-20mA current loop, a mechanical counter or an LCD. They are excellent as to their low maintenance and high reliability.