WETNET  Patented Technology is a low-power, low-cost, insertion flowmeter for water network monitoring, that can be installed on a pressure pipe without the need to interrupt the flow.
The sensor uses the principle of hydrodynamic thrust; a solid immersed in a liquid in motion receives a thrust (force) proportional to the square of the fluid velocity, the wet surface, and dependent on the shape of that surface.
Varying the size of the probe immersed in water it is possible to adapt the operating range and the accuracy of the meter.
The physical principle used allows to obtain measurements comparable with those obtained by ultrasonic meters.
The instrument in question is bi-directional, that is, what we said before is valid in both directions of the flow existing in the pipe.
The Flowmeter is provided with a free software, WCNT that allows a full parameterization and an easy functional testing both in the laboratory and in the field.
Low cost, insertion installation and the ability to send data remotely, make the flowmeter an advanced instrument suitable for large-scale applications.
Using this device it is possible to deploy networks that can monitor large areas of cities or extra-urban areas, allowing to keep under control the development of complex networks.
WETNET Flowmeter has been jointly developed by BRE Elettronica and Ingegnerie Toscane, as a key component of the WETNET project, to respond to the need of a low cost, easy to install flowmeter to be used in massive way by the operators of the integrated water service.

PATENT DESCRIPTION

A flowrate sensor includes first and second portions to be mounted protruding inside and the duct, respectively, includes a probe constrained to the first portion responsive to the flowrate and arranged to move from a rest position to a measuring position under a fluid dynamic thrust, the sensor having a load cell constrained to the second portions and arranged to receive a force from the probe responsive to the measuring position and configured to maintain a corresponding electric measurement signal, wherein first and second portions are fluid-tightly separated by a wall, and the probe and the load cell are configured for transferring a magnetic force between the probe and the cell, through the wall, without contacting each other, first and second portion being preferably housed within an elongated container whose first and second parts house first and second portions and protrude inside and outside the duct, respectively.