What can hydraulic pressure transmitters measure? This article explains the principles of hydrostatic pressure measurement and the applications of differential pressure across filtration equipment, from reservoir water levels and pump station liquid levels to pressure in water supply networks. It also outlines the limits of data use and shares key considerations for range, accuracy, signal interfaces, installation, and maintenance. With the JKU901 level transmitter specifications as a reference, it helps you select a suitable solution for your actual operating conditions and address common questions about selection and application.