The Keller ECO1 is a high-precision, economical digital pressure gauge designed for reliable and accurate pressure measurement in a wide range of industrial applications. It features a large, easy-to-read dual display that shows the current pressure value alongside the minimum or maximum recorded value since the last reset. With its simple two-button operation, users can easily switch between functions, set the zero point, and select different pressure units. The ECO1’s robust design and long battery life of up to 1000 hours make it an ideal tool for mobile calibration tasks, test bench monitoring, and general pressure verification.