They are open, standardized channels, with a rectangular section made of GRP (fiberglass reinforced polyester), equivalent to the so-called “Parshall channels”. They are used to measure the flow of industrial waste. In many cases due to the obligation of the competent Administration. The water to be measured circulates inside the channel and thanks to a certified measurement table the flow can be measured.
When what you want to measure is an average or accumulated flow, measured during a certain time, it is necessary to install an ultrasound system that measures the depth of the water at every moment and electronically accumulates the results.