high precision and wide linearity range, with long shelf life (up to 12 months for Na, K, Cl electrodes). Friendly Environmental: paper-based material reagent pack. Two sampling modes: automatic sampling with auto sampler or manual sampling. Automatic liquid level detection and alarms. Real-time diagnostic of system status and reagent pack status information. More than 100,000 test results can be stored with convenient sample results review and print-out sample ID Sample.