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Low-conductivity liquids need a meter that can resolve small changes without adding complexity to daily work. ECO 523 is designed for purest water measurement and service tasks in osmosis systems, filter technology, laboratories, pharmaceutical applications and quality assurance.
The stainless steel/PEEK 2-pole measuring cell supports high-resolution conductivity measurement up to 0.001 µS/cm. The device covers conductivity up to 100.0 µS/cm and specific resistance up to 20.00 MΩ/cm, with integrated temperature measurement and compensation modes for nLF, linear behavior and weak NaCl solutions according to EN 60746-3.
For work at the process edge, in the lab or during service visits, the handheld housing combines ingress protection (IP65/IP67), a break-proof ABS body and a backlit 3-line display. Hold, Min/Max and overhead display functions help users read and record values cleanly, even when access is awkward.
ECO 522 uses a 2-pole graphite measuring cell; ECO 523 uses a 2-pole stainless steel/PEEK measuring cell.
ECO 522 measures conductivity, salinity and TDS; ECO 523 measures conductivity, specific resistance and NaCl.
The meters offer deactivated or nLF compensation according to EN 27888; ECO 523 also includes LIN and NaCl modes.
Four long-lasting buttons operate the illuminated 3-line display, Hold function, Min/Max values and display rotation.
Temperature zero point and gradient correction, plus conductivity gradient correction, are available via the adjustment menu.
The devices operate with 2 x AA batteries and include a battery status indicator with depleted battery message.