Our flow measurement equipment are based on the principle of differential pressure measurement. It consists in modifying the fluid flow section, generating a static pressure difference, which is measured to calculate the flow-rate. Differential pressure flow meters are the oldest used devices for measuring flow-rate.
They were introduced in Roman times to bill the water distributed by the aqueducts. The first scientific studies on the subject were carried out at the beginning of the 17th century by Castelli and Torricelli, then by Bernoulli in 1738, who established his famous equation of energy conservation. The first standardized devices such as orifice plates appeared at the beginning of the 20th century in the oil industry in the United States and the first nozzles in Germany around 1930.