While developing the ECO 51x series, the focus was on the essential functions of the measurement technology. The Pure measurement with focus on precision, speed and reliability, packed in a compact housing enables the outstanding price-performance ratio, made in Germany.The hand-held measuring devices impress through their ergonomic design, the dust and water-protected design according to IP 65/67 and the illuminated display. The pH-meters are a real alternative to pH-sticks on the one hand and to high-priced, complex devices on the other. The ECO 510 enables measurements in the pH range, the ECO 511 offers additional options for measurements in the pH/redox range and a temperature input (Pt1000).This text is machine translated.