Piet van der Wal (1948-2020) Developed the TES rising plate meter together with D.L. Durksz from the DLV, after experiencing the poor quality of the then exisiting rising plate meters used in research at the time. Piet created a robust design that has proven to last for decades.

in 2021 Hedzer Durksz has taken over the production and distribution of the TES Rising plate meter. His focus is on ensuring high quality products and great service. Ensuring that all rising plate meters will have a long life.